SODIUM OLEATE

Chemically represented by the empirical molecular formula C18H33NaO2 and the condensed structural formula CH3(CH2)7CH=CH(CH2)7COONa with a molar mass of 304.44 g/mol, Sodium cis-9-Octadecenoate consists of a hydrophobic eighteen-carbon aliphatic hydrocarbon chain featuring a rigid cis-configured carbon-carbon double bond between C-9 and C-10 covalently bonded to a hydrophilic resonance-stabilized sodium carboxylate headgroup (-COO- Na+). Because the cis-9 olefinic double bond introduces a permanent 120-degree kink (~30-degree bend in the overall chain axis) in the middle of the C18 hydrocarbon tail, Sodium (9Z)-Octadec-9-enoate resists the tight crystalline lamellar packing of saturated stearates, depressing its Krafft point in water down to approximately 12 °C to 20 °C, lowering its critical micelle concentration to 1.0 to 2.1 mmol/L (0.30 to 0.64 g/L), and enabling cold-to-warm water solubility (~100 g/L at 20 °C), wormlike micellar gelation, and dense chemisorptive monolayer formation on mineral and metal oxide surfaces.

Formulators, mining metallurgists, and dry-mortar engineers systematically prefer Sodium Oleate over unneutralized liquid oleic acid, saturated long-chain soaps such as sodium stearate and sodium palmitate, and synthetic petrochemical sulfonates because dry powdered Sodyum Oleat dissolves directly in ambient process water without heated saponification kettles and operates at room temperature where sodium stearate (Krafft point ~60 °C to 71 °C) remains an insoluble solid. Compared with synthetic petroleum sulfonates, alkyl sulfates, or cationic amines in mineral flotation and construction waterproofing, Oleic Acid Sodium Salt forms high-affinity bidentate inner-sphere chelate complexes with surface calcium, iron, aluminum, and rare-earth cations—increasing mineral contact angles above 90 to 105 degrees for >90% flotation recovery and reacting in situ with Portland cement pore-water Ca2+ ions to precipitate permanent, water-repellent calcium oleate linings without retarding cement hydration or releasing volatile organic compounds.

CAS Number: 143-19-1 (Sodium Oleate / Sodium cis-9-Octadecenoate; Conjugate Free Acid Oleic Acid CAS Number: 112-80-1)
EC Number: 205-591-0 (EINECS 205-591-0 for CAS 143-19-1; EC 204-007-1 for Conjugate Free Acid CAS 112-80-1)
Molecular Formula: C18H33NaO2 (Condensed Structural Formula: CH3(CH2)7CH=CH(CH2)7COONa or C17H33COONa)
Molecular Weight: 304.44 g/mol (304.443 g/mol for anhydrous C18H33NaO2; Conjugate Free Acid Oleic Acid C18H34O2 Molecular Weight: 282.46 g/mol)
INCI Name: SODIUM OLEATE
E Number: E470a (Sodium, potassium and calcium salts of fatty acids / INS 470(i) / INS 470(ii) / Food Additive E 470a)
Melting Point: 232 °C to 235 °C (450 °F to 455 °F) for pure crystalline C18H33NaO2 (commercial technical/oleochemical grades soften and undergo thermotropic liquid-crystalline phase transitions between 180 °C and 210 °C before melting completely at 225 °C to 235 °C)
Boiling Point: Not Applicable at 101.3 kPa (anhydrous ionic carboxylate salt C18H33NaO2 undergoes thermal decarboxylation and pyrolytic decomposition above 240 °C to 260 °C prior to boiling at atmospheric pressure; theoretical calculated normal boiling point of parent free oleic acid is 360.0 °C at 760 mmHg / 286 °C at 100 mmHg)
Viscosity: Not Applicable as a free-flowing dry powder or granule; in aqueous solution at 25 °C (pH 9.5 to 10.5), dynamic viscosity is 1.2 to 2.5 mPa.s (cP) at 1.0% w/w, 8.0 to 25.0 mPa.s at 5.0% w/w, 80 to 450 mPa.s at 10.0% w/w (isotropic micellar fluid), and > 5,000 to 50,000 mPa.s above 15% to 20% w/w (viscoelastic wormlike micellar / hexagonal liquid-crystalline soap gel)
Density: True crystal / skeletal density of 1.070 to 1.120 g/cm3 at 20 °C (some commercial data sheets cite 0.90 to 1.10 g/cm3 depending on void fraction and fatty acid profile); apparent loose bulk density of 0.32 to 0.52 g/cm3 (320 to 520 kg/m3) for spray-dried fine powder and 0.48 to 0.68 g/cm3 (480 to 680 kg/m3) for compacted granular or noodle grades

Most Frequently Encountered Synonyms:
Sodium Oleate
SODIUM OLEATE
Oleic Acid Sodium Salt
Oleic Acid, Sodium Salt
Oleic Acid, Sodium Salt (1:1)
Sodium cis-9-Octadecenoate
Sodium (9Z)-Octadec-9-enoate
Sodium (Z)-Octadec-9-enoate
Sodium (Z)-9-Octadecenoate
Sodium 9-Octadecenoate
9-Octadecenoic Acid (9Z)-, Sodium Salt
9-Octadecenoic Acid (9Z)-, Sodium Salt (1:1)
9-Octadecenoic Acid (Z)-, Sodium Salt
UNII-399SL044HN
CAS 143-19-1
EC 205-591-0

PRODUCT IDENTIFICATION, CHEMICAL STRUCTURE AND CIS-OLEFINIC MOLECULAR ARCHITECTURE

Sodium Oleate, indexed globally under CAS Registry Number 143-19-1, European Community (EC / EINECS) Number 205-591-0, FDA UNII Code 399SL044HN, European Food Additive Code E470a (INS 470(i) / INS 470(ii)), and Cosmetic INCI designation SODIUM OLEATE, is the monosodium carboxylate salt of cis-9-octadecenoic acid (oleic acid, C18:1 cis-9, CAS 112-80-1). Known across chemical literature, pharmacopeial compendia, mineral-processing plants, and international procurement channels by its synonyms Oleic Acid Sodium Salt, Sodium cis-9-Octadecenoate, Sodium (9Z)-Octadec-9-enoate, 9-Octadecenoic Acid (9Z)-, Sodium Salt, Monosodium Oleate, Eunatrol, Natrii Oleas, and in Turkish chemical trade as Sodyum Oleat or Oleik Asit Sodyum Tuzu, this classic anionic surfactant possesses the empirical molecular formula C18H33NaO2 and an exact molar mass of 304.443 g/mol. Ataman Kimya supplies Sodium Oleate in multiple tailored physical forms and purity grades—ranging from high-assay >= 85% to 98% spray-dried white to off-white fine powders for dry-mix construction mortars, cosmetics, and polymer emulsions, to economical 75% to 85% active technical powders, granules, flakes, and high-solids pastes engineered for mineral froth flotation, textile waterproofing and scouring, and industrial lubricants.

To understand why Sodium Oleate exhibits physical, interfacial, and rheological properties that are radically different from saturated C18 Sodium Stearate (CAS 822-16-2, C18H35NaO2, MW 306.46 g/mol), formulators and chemical engineers must examine its molecular geometry and stereochemistry in detail:

Amphiphilic Two-Domain Architecture (C18H33NaO2, MW 304.44 g/mol):
Each formula unit of Sodium cis-9-Octadecenoate is composed of two contrasting chemical domains joined at the C-1 carbonyl carbon:
- The Hydrophobic C18:1 cis-9 Alkenyl Tail (CH3-(CH2)7-CH=CH-(CH2)7-): A seventeen-carbon monounsaturated hydrocarbon radical (the oleoyl tail) containing an sp2=sp2 carbon-carbon double bond located symmetrically between carbon-9 and carbon-10 (counting the carboxylate carbon as C-1; designated C18:1 delta-9 or omega-9). Unlike saturated stearic acid chains—which adopt an all-trans zig-zag linear rod conformation that packs tightly into high-melting crystalline bilayers—the natural Z (cis) stereochemical configuration at the C9=C10 double bond locks a rigid, permanent 120-degree bond angle (~30-degree kink in the overall hydrocarbon chain axis) right at the midpoint of the hydrophobic tail.
- The Hydrophilic Ionic Carboxylate Headgroup (-COO- Na+ at C-1): A planar, sp2-hybridized resonance-stabilized carboxylate anion (-COO-) carrying a delocalized negative charge shared equally between two equivalent C-O bonds (~1.26 Angstroms), balanced electrostatically by a monovalent sodium cation (Na+, accounting for 7.55% w/w of anhydrous C18H33NaO2). In aqueous solution above pH 8.5 to 9.5, this carboxylate headgroup is strongly hydrated by ion-dipole and hydrogen-bonding interactions and acts as a hard oxygen-donor chelating ligand toward divalent and trivalent metal cations (Ca2+, Mg2+, Fe2+/Fe3+, Al3+, Zn2+, Cu2+, Ba2+, Sr2+, and rare-earth lanthanide ions).

The Thermodynamic Impact of the Cis-9 Double-Bond Kink (Why Sodium Oleate Dissolves at 20 °C While Sodium Stearate Requires Boiling Water):
Comparing Sodium Oleate (C18:1 cis-9) against its saturated 18-carbon counterpart Sodium Stearate (C18:0) reveals one of the most dramatic structure-property relationships in colloid science:

- Krafft Temperature Depression (Tk ~ 12 °C to 20 °C vs. 60 °C to 71 °C): Because all-trans C18 chains in Sodium Stearate pack tightly with strong van der Waals dispersion forces, Sodium Stearate has a Krafft point of 60 °C to 71 °C in water—meaning below 60 °C, Sodium Stearate cannot form micelles and remains an insoluble, non-foaming chalky solid suspended in cold or warm water! By contrast, the central cis-9 kink in Sodium Oleate increases the molecular cross-sectional area in crystal lattices and frustrates tight chain packing. This lowers the Krafft point of Sodium Oleate by nearly 50 °C down to approximately 12 °C to 20 °C! Consequently, Sodyum Oleat dissolves readily in ambient water (up to ~100 g/L, or 1 part in 10 parts of water at 20 °C to 25 °C) and forms active micelles, dense foam, and reactive collector monolayers at normal room temperatures.

- Wormlike Micelle Formation and Viscoelastic Gelation: Because the kinked C18:1 oleate tail has a larger effective hydrophobic volume (v) relative to its headgroup area (a0) and critical chain length (lc), its Israelachvili surfactant packing parameter (P = v / [a0 x lc]) easily transitions from 1/3 (spherical micelles) to 1/2 (cylindrical / wormlike micelles) when concentration increases or when screened by electrolytes (such as NaCl, KCl, or triethanolamine) or partial protonation near pH 8.5 to 9.5. Entangled wormlike micelles of Oleic Acid Sodium Salt impart high zero-shear viscosity, shear-thinning pseudoplasticity, and translucent gel structure to liquid soaps, gels, and thickened drilling fluids.

- High-Density Monolayer Chemisorption on Mineral and Cement Surfaces: When Sodium (9Z)-Octadec-9-enoate chemisorbs onto calcium-bearing mineral cleavage planes (such as fluorite CaF2, scheelite CaWO4, apatite Ca5(PO4)3(F,Cl,OH), or calcite CaCO3) or reacts with Ca2+ ions inside Portland cement capillary pores, the carboxylate headgroup forms an insoluble inner-sphere calcium oleate complex (solubility product Ksp of Ca(Oleate)2 ~ 10^-15.4 to 10^-16.0 at 25 °C) while the kinked C18:1 hydrocarbon tails interlock laterally via van der Waals and pi-pi double-bond interactions to create a cohesive, defect-free hydrophobic monolayer with water contact angles of 90 to 105 degrees.

3. Exact Stoichiometric Conversion Factors for Formulators (Sodium Oleate vs. Free Oleic Acid vs. Sodium Hydroxide):
In industrial soap making, mineral flotation reagent preparation, emulsion polymerization, and dry-mortar compounding, engineers routinely convert between anhydrous Sodium Oleate (C18H33NaO2, MW = 304.443 g/mol), free Oleic Acid (C18H34O2, MW = 282.461 g/mol), and Sodium Hydroxide (NaOH, MW = 40.00 g/mol):
- 1.000 kg of 100% pure anhydrous Sodium Oleate is stoichiometrically equivalent to 0.9278 kg (927.8 g) of pure Oleic Acid neutralized with 0.1314 kg (131.4 g) of solid 100% NaOH (yielding 0.0592 kg / 59.2 g of reaction water during neutralization).
- Conversely, neutralizing 1.000 kg of pure Oleic Acid (theoretical Acid Value = 198.63 mg KOH/g) requires 0.1416 kg (141.6 g) of 100% solid NaOH (or 0.2832 kg of 50% w/w liquid caustic soda lye) and yields 1.0778 kg of anhydrous Sodium Oleate.

PHYSICAL AND CHEMICAL PROPERTIES AND QUANTITATIVE SPECIFICATIONS

Sodium Oleate exhibits a well-defined set of physical, chemical, interfacial, and thermodynamic constants that govern its performance across mineral flotation, construction waterproofing, personal care, polymer latex emulsification, and food/pharmaceutical applications. Ataman Kimya supplies Sodium Oleate across Technical Flotation / Waterproofing Grades (75% to 88% active soap), Refined Industrial & Cosmetic Grades (>= 88% to 92% active), and High-Purity Laboratory / Biochemical Grades (>= 95% to 98% C18:1 sodium salt). Below is the complete quantitative specification and physical property dataset for CAS 143-19-1:

Chemical Identity, Formula, and Molecular Weight Constants:
- Empirical Molecular Formula: C18H33NaO2 (Conjugate Free Acid: C18H34O2)
- Condensed Structural Formula: CH3(CH2)7CH=CH(CH2)7COONa (cis-delta-9 configuration)
- Exact Molar Mass (Molecular Weight): 304.443 g/mol for anhydrous C18H33NaO2 (282.461 g/mol for conjugate free oleic acid; 281.453 g/mol for the oleate anion C18H33O2-)
- Theoretical Elemental Composition (100% Pure Anhydrous C18H33NaO2 Basis): Carbon (C) 71.01% w/w; Hydrogen (H) 10.93% w/w; Oxygen (O) 10.51% w/w; Sodium (Na) 7.55% w/w (corresponding to 10.18% w/w as Na2O alkali equivalent)
- Theoretical Free Fatty Acid Equivalent: 92.78% w/w as C18H34O2

Physical Appearance, Odor, Color, and Polymorphic State:
- Physical State at 20 °C and 101.3 kPa: White to creamy off-white or pale yellowish-tan fine amorphous/microcrystalline powder, spray-dried hollow micro-granules, extruded noodles, or translucent yellowish-amber high-solids paste (depending on grade and moisture content)
- Odor Profile: Mild, characteristic fatty, soap-like, or faint tallow/olive-oil odor (vegetable-derived cosmetic grades are deodorized to a clean, neutral soap scent)
- Color of 5% w/w Aqueous / Hydroalcoholic Solution: Clear to slightly opalescent, colorless to pale straw-yellow (Gardner Color <= 2 to 4 for Refined Cosmetic/Polymer grades; <= 5 to 8 for Technical Flotation grades)

Active Soap Assay, Fatty Acid Composition, and Moisture Specifications:
- Total Active Fatty Acid Sodium Salt Assay: >= 95.0% to 98.5% w/w (anhydrous basis) for High-Purity / Biochemical Grade; >= 88.0% to 93.0% w/w for Refined Cosmetic, Polymer Emulsifier, and Construction Waterproofing Powder Grades; 75.0% to 86.0% w/w for Technical Mineral Flotation Grades
- Total Fatty Matter (TFM / Acid-Split Fatty Acid Content): >= 80.0% to 88.0% w/w for standard dry powder grades (theoretical maximum for 100% pure anhydrous C18H33NaO2 is 92.78% w/w)
- Fatty Acid Chain-Length Distribution of the Oleoyl Fraction (by Capillary GC of Methyl Esters, ISO 12966): In high-purity grades, cis-9-Oleic Acid (C18:1) is >= 85.0% to 99.0% of total fatty acids; in commercial oleochemical vegetable/tallow grades, C18:1 Oleic Acid is 70.0% to 85.0%, C18:2 Linoleic Acid is 4.0% to 12.0%, C16:0 Palmitic Acid is 3.0% to 8.0%, C18:0 Stearic Acid is 1.0% to 4.0%, and C14:0/C16:1 are <= 2.0%
- Iodine Value (of Split Fatty Acid Fraction, Wijs Method ISO 3961): 80.0 to 95.0 g I2 / 100 g (theoretical Iodine Value for 100% pure C18H33NaO2 is 83.36 g I2 / 100 g salt, or 89.86 g I2 / 100 g free oleic acid)
- Moisture Content / Loss on Drying (105 °C, 2 hours, ISO 672): <= 1.5% to 3.0% w/w for free-flowing spray-dried powder grades (essential for dry-mix mortar anti-caking); <= 3.0% to 5.0% w/w for standard technical granules

Thermal Phase Transitions (Melting Point, Liquid-Crystal Transitions, Krafft Point, and Decomposition):
- Melting Point (Capillary / DSC Fusion Peak): 232 °C to 235 °C (450 °F to 455 °F) for pure anhydrous crystalline Sodium Oleate (commercial oleochemical grades exhibit thermotropic solid-to-smectic/ribbon liquid-crystalline transitions between 115 °C and 195 °C, softening around 180 °C to 210 °C and melting into an isotropic liquid at 225 °C to 235 °C)
- Boiling Point at 101.3 kPa: Not Applicable for ionic Sodium Oleate (undergoes thermal decarboxylation and free-radical hydrocarbon cracking above 240 °C to 260 °C prior to boiling; chemical databases citing 359.99 °C or 360.0 °C at 760 mmHg refer to the theoretical boiling point of the conjugate free Oleic Acid C18H34O2)
- Flash Point: > 250 °C to 270 °C (open cup; non-volatile organic salt; dust clouds of fine powder < 63 microns have a Minimum Ignition Temperature MIT > 400 °C to 440 °C)
- Krafft Point (Krafft Temperature, Tk) in Water: 12 °C to 20 °C for pure Sodium cis-9-Octadecenoate (compared to 60 °C to 71 °C for Sodium Stearate C18:0 and ~38 °C to 42 °C for trans-isomer Sodium Elaidate C18:1 trans-9)

Density, Bulk Density, and Particle Size Granulometry:
- True Skeletal / Crystal Density at 20 °C: 1.070 to 1.120 g/cm3 (pycnometric crystal density; apparent particle density including closed micro-voids is 0.90 to 1.05 g/cm3)
- Apparent Loose Bulk Pour Density (ISO 697): 0.32 to 0.52 g/cm3 (320 to 520 kg/m3) for spray-dried fine powder grades; 0.48 to 0.68 g/cm3 (480 to 680 kg/m3) for compacted granular, flake, or noodle grades
- Tapped Bulk Density: 0.44 to 0.65 g/cm3 for powder grades
- Particle Size Distribution (Construction Waterproofing & Cosmetic Powder Grades): >= 95.0% to 99.0% passing 80-mesh (180 microns) or 100-mesh (150 microns) sieve, with median particle diameter D50 = 35 to 90 microns for rapid cold-water dissolution in dry-mix mortars

Solubility, Aqueous Hydrolysis Equilibrium, pH, and Acid-Soap Chemistry:
- Aqueous Solubility at 20 °C to 25 °C: Soluble in approximately 10 parts of water (~100 g/L, or 9% to 10% w/w as a clear-to-opalescent mobile micellar solution at 20 °C; at 50 °C to 70 °C, solubility exceeds 250 to 350 g/L, forming viscous liquid-crystalline middle/neat soap phases at 15% to 40% w/w)
- Ethanol and Organic Solvent Solubility: Soluble in approximately 20 parts of cold 95% ethanol (~50 g/L at 20 °C, forming a neutral, non-hydrolyzed alcoholic solution) and in 1 part of boiling ethanol; soluble in methanol, warm propylene glycol, and warm ethylene glycol; practically insoluble (< 0.1 g/L) in diethyl ether, petroleum ether, acetone, benzene, hexane, and cold non-polar mineral spirits
- Aqueous pH and Partial Hydrolysis Equilibrium (at 25 °C): A 1.0% to 5.0% w/w aqueous solution of Sodyum Oleat exhibits an alkaline pH of 9.5 to 11.0 (typically pH 9.8 to 10.6). Because oleic acid is a weak carboxylic acid (intrinsic monomeric pKa = 4.85 to 5.02; apparent surface/micellar pKa = 7.5 to 8.5 due to electrostatic charge crowding at the micelle surface!), dissolving Sodium Oleate in pure neutral water triggers partial conjugate-base hydrolysis:
  C17H33COO- + H2O <-> C17H33COOH + OH-  and  C17H33COO- + C17H33COOH <-> [C17H33COO ... HOOC-C17H33]- (1:1 Acid-Soap Dimer)
- This partial hydrolysis explains why dilute aqueous solutions of Sodium Oleate in unbuffered water develop a faint, characteristic pearlescent opalescence (caused by sub-micron vesicles of the ultra-surface-active 1:1 acid-soap complex, NaH(C18H33O2)2), whereas adding a trace of NaOH (raising pH above 10.5 to 11.0) or dissolving in 20% ethanol suppresses hydrolysis and yields a water-white, optically transparent solution!

Interfacial Chemistry, Critical Micelle Concentration (CMC), Surface Tension, and HLB:
- Critical Micelle Concentration (CMC) at 25 °C: In deionized water at pH 10.0 to 10.5, CMC = 1.0 to 2.1 mmol/L (mM), corresponding to 0.30 to 0.64 g/L (0.030% to 0.064% w/w active C18H33NaO2). In the presence of 0.05 M NaCl electrolyte or at pH 8.5 to 9.5 where 1:1 acid-soap dimers form, the effective aggregation threshold (semi-micelle / vesicle concentration) drops to 0.10 to 0.50 mmol/L (30 to 152 mg/L)
- Equilibrium Surface Tension at CMC (gamma_CMC, 25 °C): Reduces the surface tension of water from 72.0 mN/m down to 25.0 to 28.5 mN/m (dyn/cm) at pH 9.0 to 10.5—one of the lowest equilibrium surface tension plateaus achievable by any non-fluorinated hydrocarbon surfactant!
- Hydrophile-Lipophile Balance (HLB): Empirical Griffin/Davies HLB value = 18.0 (based on Davies group numbers: -COONa = +19.1, 17 aliphatic carbon groups + 1 cis double bond = -8.1, plus +7.0 base = 18.0), classifying Sodium Oleate as a strongly hydrophilic O/W emulsifier, wetting agent, and foaming detergent
- Calcium Tolerance and Divalent Cation Solubility Product (Ksp at 25 °C): Like all long-chain fatty acid carboxylate soaps, Sodium Oleate reacts stoichiometrically with dissolved divalent and trivalent metal cations in water (2 C17H33COONa + Ca2+ -> Ca(C17H33COO)2 (s) + 2 Na+). At 25 °C, the thermodynamic solubility product (pKsp = -log Ksp) is 15.4 to 16.0 for Calcium Oleate (Ca(C18H33O2)2), 13.8 to 14.5 for Magnesium Oleate (Mg(C18H33O2)2), and 18.2 to 20.5 for Ferric/Aluminum Oleates. While this low Ksp causes 'soap scum' in unchelated hard-water laundry washing, it is the exact thermodynamic driving force that makes Sodium Oleate an unbeatable chemisorptive collector for calcium/iron minerals in froth flotation, a precursor for manufacturing insoluble metallic oleates/stearates, and a permanent pore-plugging hydrophobic agent in calcium-rich Portland cement mortars!

Purity Limits, Free Alkali, Inorganic Salts, and Heavy Metal Thresholds:
- Free Alkali (as NaOH): <= 0.2% to 0.5% w/w for Cosmetic, Polymer, and Food Grades (<= 1.0% w/w as Na2CO3/NaOH for Technical Flotation Grades)
- Free Unneutralized Fatty Acid (as Oleic Acid): <= 0.5% to 1.5% w/w
- Inorganic Salts (NaCl + Na2SO4 + Na2CO3): <= 0.5% to 1.5% w/w in High-Purity and Cosmetic Grades
- Unsaponifiable Matter: <= 0.5% to 1.2% w/w
- Peroxide Value (meq O2/kg): <= 5.0 to 10.0 meq/kg in freshly stabilized powder grades (protected with 50 to 200 ppm food/cosmetic-grade BHT or tocopherol antioxidant when specified)
- Heavy Metals (Food E470a / Cosmetic / Compendial Grades): Lead (Pb) <= 2.0 mg/kg (ppm); Arsenic (As) <= 2.0 to 3.0 mg/kg; Mercury (Hg) <= 1.0 mg/kg; Cadmium (Cd) <= 1.0 mg/kg; Total Heavy Metals (as Pb) <= 10 mg/kg

INDUSTRIAL MANUFACTURING PROCESS, SAPONIFICATION AND SPRAY-DRYING ENGINEERING

Industrial manufacturing of high-purity Sodium Oleate (CAS 143-19-1) requires careful selection of the parent oleic acid feedstock, oxygen-excluded stoichiometric neutralization with sodium hydroxide, and low-temperature thermal drying to preserve the cis-9 double bond against autoxidation, trans-elaidization, and color darkening:

Stage 1 — Oleic Acid Feedstock Fractionation and Botanical / Tallow Origin Selection:
Commercial production starts with distilled, fractionated Oleic Acid (cis-9-octadecenoic acid, CAS 112-80-1) obtained from one of two renewable lipid streams:

- 100% Vegetable-Derived Oleic Acid Route (Olive, High-Oleic Sunflower, Canola/Rapeseed, or Palm Olein): Preferred for Cosmetic (INCI: SODIUM OLEATE), Food Additive (E470a), Pharmaceutical, Halal, Kosher Parve, and Vegan applications, as well as premium low-titer mineral flotation collectors. High-oleic sunflower oil (containing 82% to 90% C18:1 cis-9 oleic acid) or palm/olive oil is hydrolyzed with high-pressure steam at 250 °C and 50 bar, followed by fractional crystallization (solvent or hydrophilization winterization at 0 °C to 10 °C to remove saturated C16 palmitic and C18 stearic acids) and high-vacuum fractional distillation (at 1 to 3 mbar and 190 °C to 210 °C) to isolate water-white distilled Oleic Acid (C18:1 assay 75% to 95%, titer < 5 °C to 12 °C).

- Animal Tallow Oleic Acid Route (Red Oil / Distilled Tallow Oleic Acid): Obtained by splitting beef or mutton tallow, pressing or crystallizing out the solid tristearin/stearic acid fraction, and vacuum-distilling the liquid olein fraction (typically 68% to 78% C18:1 oleic acid, 6% to 12% C18:2 linoleic acid, and 5% to 10% C16/C18 saturated acids). Widely utilized in heavy industrial lubricant greases, rubber compounding, and bulk ore flotation.

Stage 2 — Stoichiometric Saponification / Neutralization in Aqueous or Hydroalcoholic Media:
Purified liquid Oleic Acid is charged into a nitrogen-blanketed, jacketed 316L stainless-steel reactor equipped with high-torque anchor-and-rotor-stator agitation. An equimolar quantity of membrane-grade aqueous Sodium Hydroxide (NaOH, 25% to 50% w/w caustic soda solution, or ethanolic NaOH for ultra-pure laboratory grades) is metered into the reactor at 60 °C to 85 °C:
CH3(CH2)7CH=CH(CH2)7COOH (Oleic Acid) + NaOH -> CH3(CH2)7CH=CH(CH2)7COONa (Sodium Oleate) + H2O (Delta H = -56.0 kJ/mol)
Because concentrated aqueous Sodium Oleate forms a highly viscous hexagonal liquid-crystalline gel ('middle soap' phase, > 20,000 mPa.s) between 18% and 35% w/w solids in pure water below 60 °C, industrial plants employ one of three process engineering strategies during neutralization:

- Strategy A (Hot Kneader / Extruder Saponification at 75% to 88% Solids): Molten oleic acid and concentrated 48% to 50% w/w aqueous NaOH are metered continuously into a jacketed twin-screw reactive extruder or sigma-blade kneader at 80 °C to 105 °C under nitrogen. The resulting concentrated 'neat soap' paste (containing 12% to 20% water) is extruded directly onto a vacuum drum dryer or flash-dryer mill.

- Strategy B (Heated Low-Viscosity Slurry Spray Drying): Neutralization is carried out at 75 °C to 90 °C at 25% to 35% w/w solids (where elevated temperature melts the liquid-crystalline gel into a pumpable isotropic fluid) and atomized through high-pressure nozzles into a nitrogen-inerted or low-oxygen co-current spray-drying tower (inlet air 160 °C to 190 °C, outlet air 75 °C to 90 °C) to yield hollow, fast-dissolving spherical powder particles (bulk density 0.35 to 0.50 g/cm3, moisture <= 2.0%).

- Strategy C (Alcoholic Neutralization and Vacuum Crystallization for >= 95%–98% Pure Grade): Distilled >= 99% cis-9-oleic acid is neutralized with stoichiometric NaOH in warm 90%–95% ethanol or isopropanol (where Sodium Oleate remains a low-viscosity true solution without gelling), filtered through activated carbon, and dried under vacuum at 50 °C to 70 °C to produce snow-white, odor-free crystalline Sodium Oleate Powder.

Stage 3 — Post-Drying Cooling, Antioxidant Stabilization, and Classification:
Because freshly dried warm Sodium Oleate powder has a high specific surface area and contains an unsaturated C9=C10 double bond, discharging warm powder (> 60 °C) directly into bulk bags can lead to slow exothermic autoxidation (self-heating) in air! Therefore, the dried powder is immediately cooled below 30 °C to 35 °C in a chilled fluidized-bed cooler under dry air or nitrogen, optionally stabilized with 50 to 200 ppm of alpha-tocopherol (Vitamin E) or BHT when permitted by the target application, classified through 80-mesh to 100-mesh vibratory screens, and packed into moisture- and oxygen-barrier polyethylene-lined bags.

MINERAL FROTH FLOTATION AND MINING BENEFICIATION APPLICATIONS

In global extractive metallurgy and mineral processing, Sodium Oleate (CAS 143-19-1, Sodyum Oleat) is the undisputed industry-benchmark anionic carboxylate collector for the direct and reverse froth flotation of non-sulfide minerals—specifically salt-type calcium minerals, metallic oxide ores, carbonate minerals, and silicate/rare-earth deposits. Typical industrial collector dosages range from 100 to 1,200 grams of Sodium Oleate per metric ton of dry ore (g/t), dosed as a 1.0% to 5.0% w/w aqueous stock solution into alkaline or neutral flotation pulps (pH 7.0 to 10.5):

Dual-Regime Interfacial Mechanism on Mineral Surfaces (Inner-Sphere Chemisorption and Semi-Micelle Aggregation):
Spectroscopic FTIR, XPS, zeta-potential, and micro-flotation studies demonstrate that Oleic Acid Sodium Salt renders hydrophilic mineral surfaces hydrophobic through a concentration- and pH-dependent mechanism:
- Inner-Sphere Bidentate Chemisorption: When Sodium cis-9-Octadecenoate is added to an aqueous mineral pulp at pH 8.0 to 10.0, the ionized oleate carboxylate oxygen atoms (-COO-) chemically coordinate directly to exposed lattice metal cations—such as Ca2+ on fluorite, scheelite, apatite, and calcite; Fe3+ on hematite and ilmenite; Al3+ on bauxite and spodumene; Zn2+ on smithsonite; and Ce3+/La3+ on bastnaesite—displacing coordinated water molecules and forming an insoluble, chemisorbed surface metal-oleate complex.
- The Semi-Micelle Concentration (SMC) Window vs. Critical Micelle Concentration (CMC) Over-Dosing: At the Semi-Micelle Concentration (SMC, typically 1.0 x 10^-4 to 5.0 x 10^-4 mol/L, or 30 to 150 mg/L in the flotation pulp), adsorbed oleate chains associate laterally on the mineral surface via van der Waals and cis-olefinic pi-pi interactions to form a dense, upright hydrophobic monolayer. This raises the mineral-water contact angle from < 35 degrees to 95–105 degrees and achieves peak flotation recovery of 90% to 98%! Crucially, metallurgists must avoid overdosing Sodium Oleate above its bulk Critical Micelle Concentration (CMC ~ 1.0 x 10^-3 to 2.0 x 10^-3 mol/L, or 300 to 600 mg/L): above the CMC, oleate anions form bulk micelles and bilayer flip-flop aggregates (with polar -COO- headgroups pointing back into water), which drops the mineral contact angle and reduces flotation recovery.
- The Role of the 1:1 Acid-Soap Dimer at pH 8.0 to 9.0: Near pH 8.0 to 9.0, the co-existence of ionized oleate (OA-) and trace neutral oleic acid (OAOH) generates the ultra-surface-active 1:1 acid-soap dimer ([OA...HO-A]-), which lowers dynamic surface tension at the air-bubble interface (acting simultaneously as collector and frother) and co-adsorbs into the mineral monolayer to maximize bubble-particle attachment.

Key Non-Sulfide Mineral Ores Beneficiated with Sodium Oleate:
- Fluorite / Fluorspar (CaF2) Flotation: Dosed at 200 to 600 g/t at pH 8.5 to 9.5 (adjusted with sodium carbonate Na2CO3 and depressed with sodium silicate Na2SiO3 and quebracho/tannin or acidified water glass to depress calcite and quartz gangue), Sodium Oleate floats acid-grade fluorspar concentrates (>= 97% CaF2) at > 90% recovery even in ambient-temperature circuits (15 °C to 25 °C) where saturated tallow soaps fail.
- Scheelite (CaWO4) and Wolframite ((Fe,Mn)WO4) Tungsten Ore Flotation: In the roughing and heated cleaning (Petrov process) of tungsten ores at pH 9.0 to 10.5 with sodium silicate depressant, Sodium (9Z)-Octadec-9-enoate (often paired with oxidized paraffin soap or nonionic alcohol ethoxylates) selectively floats scheelite away from calcite and fluorite.

- Phosphate Rock / Apatite (Ca5(PO4)3(F,Cl,OH)) Direct & Reverse Flotation: Used at 300 to 1,000 g/t at pH 9.0 to 10.0 in direct flotation of sedimentary and igneous apatite (with starch or sodium silicate depressants) to produce > 30%–36% P2O5 fertilizer concentrates, or at mildly acidic pH 5.5 to 6.5 (with phosphoric acid depressant) in reverse flotation to float dolomite/calcite carbonate impurities away from phosphate.
- Iron Ores (Hematite Fe2O3, Magnetite Fe3O4, Goethite) and Titanium Ores (Ilmenite FeTiO3, Rutile TiO2): In direct anionic flotation at pH 6.5 to 7.5, Sodium Oleate chemisorbs onto Fe3+/Ti4+ sites to float iron and titanium oxides; in reverse anionic flotation of iron ore at pH 11.0 to 11.5, Ca2+-activated quartz gangue (activated with CaO/CaCl2 while hematite is depressed with corn starch) is floated off using Sodium Oleate to yield ultra-low-silica (< 1.5% SiO2) iron ore pellet feed.
- Lithium Pegmatites (Spodumene LiAlSi2O6), Bauxite, and Rare-Earth Minerals (Bastnaesite, Monazite): In lithium battery-mineral beneficiation, NaOH-scrubbed spodumene ore is conditioned with 400 to 800 g/t of Sodium Oleate at pH 8.0 to 9.0 to selectively float spodumene (> 6.0% Li2O concentrate) away from quartz, albite, and muscovite mica.
- Carbonate, Sulfate, and Oxide Industrial Minerals: Benchmark collector for magnesite (MgCO3), smithsonite (ZnCO3), cerussite (PbCO3), barite (BaSO4), celestite (SrSO4), calcite (CaCO3), rhodochrosite (MnCO3), and cassiterite (SnO2).

CONSTRUCTION DRY-MIX MORTARS, CONCRETE WATERPROOFING AND PORE-BLOCKING ADMIXTURES

In the modern construction chemicals and building materials industry, fine spray-dried Sodium Oleate Powder (80 to 100 mesh, moisture <= 2.0%, active assay >= 88% to 92%) is one of the most effective, cold-water-soluble integral hydrophobic waterproofing and capillary pore-blocking agents for dry-mix mortars, architectural renders, tile grouts, gypsum plasters, and concrete admixtures, typically dosed at 0.05% to 0.50% w/w on total dry mortar weight:

The In-Situ Calcium-Reaction Waterproofing Mechanism in Portland Cement Matrices:
When water is mixed into a dry-mix cementitious mortar, render, or concrete batch, hydration of tricalcium silicate (C3S) and dicalcium silicate (C2S) rapidly saturates the aqueous pore solution with calcium ions (Ca2+) and hydroxide ions (OH-) at pH 12.5 to 13.5. Why do dry-mortar formulators specify water-soluble Sodium Oleate Powder instead of pre-formed insoluble Calcium Stearate or Zinc Stearate powders? Because pre-formed Calcium Stearate is completely insoluble in cold mixing water (melting point 150 °C) and cannot dissolve during a brief 60-to-120-second drill or pan mixing cycle at the jobsite—remaining as localized solid particles that leave capillary pore walls uncoated! By contrast, spray-dried Sodyum Oleat Powder has a low Krafft point (12 °C to 20 °C) and dissolves instantaneously into the cold gauging water during the first 10 to 30 seconds of mixing. The dissolved oleate anions (C17H33COO-) migrate throughout the entire microscopic capillary pore network and air-void interfaces of the wet mortar, where they react in situ with dissolved Ca2+ ions liberated by the hydrating cement:
2 CH3(CH2)7CH=CH(CH2)7COONa (Soluble Sodium Oleate) + Ca(OH)2 (Cement Pore Water) -> Ca[CH3(CH2)7CH=CH(CH2)7COO]2 (Insoluble Hydrophobic Calcium Oleate Film) + 2 NaOH

This in-situ precipitation coats every internal capillary pore wall with a molecularly bonded, water-insoluble monolayer of calcium oleate whose hydrophobic C18:1 hydrocarbon tails point into the pore lumen. According to the Washburn capillary pressure equation (Delta P = [2 x gamma x cos(theta)] / r), shifting the internal pore-wall contact angle (theta) from < 30 degrees (hydrophilic untreated cement) to > 100–115 degrees (hydrophobic oleate-lined pore) flips cos(theta) from positive to negative, actively repelling liquid rainwater and groundwater capillary suction while leaving the pores open to breathable water-vapor diffusion (high water-vapor permeability, mu-value unchanged)!

Key Construction Applications and Dosage Guidelines:
- Exterior Facade Renders, Stuccos, and Skim Coats (EN 998-1): Dosed at 0.10% to 0.30% w/w of dry mix (often blended 1:1 with calcium/zinc stearate or silicone powders), Sodium Oleate reduces 24-hour capillary water absorption (EN 1015-18 coefficient W) below 0.20 kg/(m2.min^0.5) (Class W2), eliminates freeze-thaw spalling, prevents efflorescence (by blocking capillary transport of dissolved calcium hydroxide and alkali sulfates to the facade surface), and keeps exterior walls dry and resistant to algae and fungal growth.

- Cementitious Tile Grouts (EN 13888 CG2W) and Waterproofing Slurries: Dosed at 0.15% to 0.40% w/w to impart water-beading ('lotus effect'), stain resistance against coffee, wine, and cooking oils, and reduced water absorption in bathroom, kitchen, and swimming-pool tile joints.
- EIFS / ETICS Basecoats, Repair Mortars, and Autoclaved Aerated Concrete (AAC) Block Adhesives: Improves wet workability, micro-air entrainment stability, and long-term weather durability without lowering flexural or bond strength when dosed at 0.05% to 0.25% w/w.
- Liquid Integral Waterproofing Admixtures for Ready-Mix and Precast Concrete (EN 934-2 Table 9): Dissolved at 5% to 12% w/w in water (often combined with tall oil fatty acid soaps, rosin soaps, or silane/siloxane emulsions) to manufacture liquid integral damp-proofing admixtures for basement walls, foundations, concrete roof tiles, and paving blocks.

PERSONAL CARE, COSMETICS, SOAP MAKING AND PHARMACEUTICAL APPLICATIONS

In cosmetics, personal care, toiletries, and pharmaceutical compounding, INCI SODIUM OLEATE (CAS 143-19-1) is an essential cleansing surfactant, oil-in-water (O/W) emulsifier, viscosity controller, and translucent gelling agent:

Traditional Castile & Marseille Bar Soaps, Combo Bars, and Translucent Glycerin Soaps:
Sodium Oleate is the principal chemical constituent of classic olive-oil soaps (historically celebrated as Castile soap in Spain and Savon de Marseille in France, where olive oil triglycerides containing 70% to 80% oleic acid are saponified with sodium hydroxide). In modern industrial bar-soap and combo-bar manufacturing (where tallow/palm sodium palmitate-stearate and coconut/palm-kernel sodium cocoate-laurate noodles are plodded together), Sodium cis-9-Octadecenoate accounts for 20% to 45% of the total soap base. While saturated C16/C18 palmitate-stearate provides bar hardness and C12 laurate provides big-bubble flash foam in cold water, the monounsaturated C18:1 Sodium Oleate fraction is indispensable because it: (a) plasticizes the soap billet during vacuum plodding and stamping to prevent bar cracking during use; (b) lowers the Krafft point of the mixed soap so it dissolves smoothly at hand-washing temperatures (20 °C to 35 °C); and (c) generates a dense, slippery, ultra-mild, creamy micro-lather with superior skin-conditioning cushion. In transparent glycerin soaps, the high solubility of Sodium Oleate in warm alcohol-glycerin-sugar mixtures prevents opaque soap crystal nucleation upon cooling.

Deodorant Sticks, Antiperspirant Gels, and Shaving Creams (Translucent Structurant / Gelling Agent):
Alongside sodium stearate, refined vegetable Sodium Oleate (dosed at 2.0% to 8.0% w/w) is dissolved in warm propylene glycol, dipropylene glycol, 1,3-propanediol, or glycerin-water blends (at 65 °C to 80 °C) and poured into molds to form crystal-clear, rigid deodorant sticks and cologne sticks. Compared to pure sodium stearate—which can form opaque white crystalline spherulites and brittle sticks that crumble or sweat (syneresis)—incorporating 1.0% to 3.0% w/w of Sodium (9Z)-Octadec-9-enoate modifies the fibrillar soap-gel network, improving optical transparency, glide smoothness on underarm skin, and fragrance pay-off.

O/W Cosmetic Emulsions, Cleansing Creams, Lotions, and Color Cosmetics:
With a hydrophilic HLB value of 18.0, Sodium Oleate (used at 0.3% to 2.5% w/w, either added directly as a powder or formed in situ at the oil-water interface by neutralizing oleic acid in the oil phase with NaOH or borax/alkanolamine in the water phase) produces fine, stable oil-in-water emulsions for vanishing creams, cold creams, shaving lathers, waterproof mascara bases, and liquid foundations. Because nascent interfacial saponification reduces dynamic oil-water interfacial tension below 0.1 mN/m, spontaneous sub-micron emulsification occurs with minimal mechanical shear.

Pharmaceutical, Biomedical, and Liposomal Drug-Delivery Applications:
- Parenteral & Oral Bile-Secretion / Choleretic Heritage (Eunatrol): Historically indexed in pharmaceutical compendia under the trade name Eunatrol and Latin monograph Natrii Oleas as a choleretic excipient and gallstone-solubilizing adjuvant, and previously utilized as a vascular sclerosing agent.
- Transdermal Permeation Enhancer and pH-Sensitive Liposomes / Ufasomes: In modern pharmaceutical nanomedicine, high-purity (>= 98%) Sodium Oleate self-assembles with cholesterol or phospholipids at pH 7.5 to 9.0 into unsaturated fatty acid vesicles ('ufasomes') and pH-sensitive liposomes that fuse and release encapsulated drugs upon encountering the mildly acidic microenvironment (pH 5.0 to 6.5) of endosomes, tumors, or inflamed skin. Simultaneously, the cis-9-octadecenoate chain intercalates into stratum corneum lipid bilayers to fluidize ceramide packing and enhance transdermal flux of poorly permeable APIs.
- Magnetic Iron Oxide Nanoparticle (SPION) Surface Coating & Phase Transfer: In biomedical MRI contrast agent and ferrofluid synthesis, Sodium Oleate is universally used as a biocompatible bilayer capping ligand to convert hydrophobic oleic-acid-coated Fe3O4 superparamagnetic nanoparticles into water-dispersible, colloidally stable aqueous ferrofluids.

EMULSION POLYMERIZATION, RUBBER, TEXTILE, METALWORKING AND FOOD-CONTACT APPLICATIONS

Sodium Oleate (CAS 143-19-1) is a workhorse industrial surfactant, emulsifier, lubricant, and regulatory-approved additive across elastomer manufacturing, textile wet processing, metalworking, oilfield drilling, paper treatment, and food-related applications:

Synthetic Rubber Emulsion Polymerization (SBR, NBR, and CR Latices), Latex Sponge Foaming, and Elastomer Processing:
- Primary Micellar Emulsifier in Cold and Hot Emulsion Polymerization: In the industrial production of emulsion Styrene-Butadiene Rubber (E-SBR, such as SBR 1500/1502/1712), Nitrile-Butadiene Rubber (NBR), and Polychloroprene (CR / Neoprene), Sodium Oleate (and disproportionated rosin-fatty acid sodium soap blends) is charged at 2.0 to 5.0 parts per hundred monomer (phm) into the alkaline aqueous phase (pH 9.5 to 10.8). With a low CMC (~1.5 mM), Oleic Acid Sodium Salt forms abundant monomer-swollen micelles that nucleate uniform 50 to 150 nm latex particles. Once polymerization reaches the target conversion (60% to 75%), acidifying the latex with sulfuric acid or alum + brine (pH < 4.5) instantaneously protonates the soluble Sodium Oleate emulsifier into water-insoluble free oleic acid, cleanly coagulating the rubber crumb while leaving the retained oleic acid inside the rubber to serve as a beneficial vulcanization activator (reacting with ZnO during curing) and internal processing aid!
- Mold Release, Anti-Tack Dipping Slurry, and Latex Sponge Foaming Aid: Aqueous solutions of 1.0% to 4.0% w/w Sodyum Oleat are used as anti-tack slab dips for uncured rubber sheets in tire factories, as mold-release coatings for molded rubber and polyurethane goods, and as high-volume mechanical frothing and foaming agents in Dunlop and Talalay molded latex sponge mattresses, pillows, and carpet backings.

Textile Scouring, Wool Fulling, Degumming, and Two-Bath Fabric Waterproofing:
- Wool Scouring, Fulling, and Silk Degumming: In textile wet processing, Sodium cis-9-Octadecenoate has been valued for over a century as a gentle, high-lubricity scouring and fulling soap for delicate protein fibers (raw wool, cashmere, alpaca, and natural silk degumming of sericin) as well as cotton kier-boiling and soaping-off of reactive and vat prints at 60 °C to 95 °C. Unlike harsh synthetic petro-sulfonates that strip internal intercellular lipids from wool and leave a harsh, brittle hand, Sodium Oleate cleanses spinning oils and natural lanolin grease at pH 8.5 to 9.8 while leaving a soft, lofty, lubricated handle on wool and silk fabrics.
- Two-Bath Textile Fabric Waterproofing (Aluminum / Zirconium Soap Impregnation): In classic breathable waterproofing of canvas, tents, awnings, and heavy cotton/cellulosic fabrics, the fabric is first padded through a warm 1% to 3% w/w aqueous bath of Sodium Oleate and then passed through a second bath of aluminum sulfate (alum), aluminum acetate, or zirconium oxychloride. Ion exchange precipitates an adherent, hydrophobic coating of Aluminum Trioleate or Zirconium Oleate directly onto the textile fibers, imparting durable water repellency while preserving fabric breathability.

Metalworking Fluids, Wire Drawing, Steel Ball Cleaning, and Precursor to Metallic Soaps:
- Reactive Soap Coating on Phosphated Steel for Cold Forging and Water-Tank Wire Drawing: In cold extrusion, deep drawing, tube drawing, and wet water-tank steel wire drawing, phosphated steel workpieces (coated with a porous crystalline zinc phosphate Zn3(PO4)2 layer) are immersed in a hot 3% to 8% w/w aqueous bath of Sodium Oleate / Sodium Stearate at 65 °C to 80 °C. The Sodium Oleate reacts chemically with the zinc phosphate crystals to form a tightly bonded, self-healing boundary lubrication layer of Zinc Soap (Zn(Oleate)2) that withstands extreme die pressures (> 1,500 MPa) without metal-to-die galling or seizure.
- Cooling Lubricating Emulsifier, Steel Ball Surface Cleaning, and Corrosion Inhibition: Dosed at 0.5% to 3.0% w/w in soluble-oil and semi-synthetic metalworking fluids as a cooling lubricating O/W emulsifier, boundary lubricity additive, precision steel ball bearing surface cleaning agent, and ferrous flash-rust preservative, as well as in water-based and invert-emulsion oilfield drilling fluids as a torque-and-drag reducing lubricant and asphaltene emulsifier.
- Double-Decomposition Precursor for Insoluble Metallic Oleates and Stearates: Aqueous Sodium Oleate is reacted stoichiometrically with soluble calcium, zinc, magnesium, aluminum, barium, copper, or lead salts (double-decomposition precipitation process) to manufacture insoluble metallic oleates used in waterproofing, driers, lubricants, and antifouling coatings.

Pulp & Paper Deinking, Paper Surface Treatment, Waterborne Coatings, and Leather Finishing:
- Flotation Deinking and Paper Fiber Treatment: In recycled wastepaper deinking mills, Sodium Oleate (dosed at 0.3% to 1.0% w/w on dry fiber alongside 100 to 250 ppm Ca2+ hardness at pH 8.5 to 9.5) reacts in situ to form hydrophobic micro-precipitates of calcium oleate that bind selectively to detached hydrophobic offset, flexo, and xerographic toner ink particles, floating the ink specks into the skimmable froth layer to restore high ISO paper brightness, while also serving as a paper surface sizing and fiber-softening agent.
- Waterborne Coatings, Inks, Asphalt Emulsions, and Leather Fatliquoring: Used as a pigment wetting and dispersing agent in water-based coatings and printing inks, an anionic emulsifier for asphalt/bitumen emulsions, an anti-caking coating for fertilizers, and a fatliquoring emulsifier and leather-finishing auxiliary.

Direct Food Additive (E470a / INS 470(i)) and US FDA Food-Contact Applications:
- European Union & Codex Food Additive E470a: Under EU Regulation (EC) No 1333/2008 and Commission Regulation (EU) No 231/2012, food-grade Sodium Oleate is authorized within Food Additive E 470a (Sodium, potassium and calcium salts of fatty acids) as an emulsifier, stabilizer, anticaking agent, glazing agent, and tablet binder/lubricant across permitted food categories and dietary supplements.
- U.S. FDA Title 21 CFR Clearances: Approved under 21 CFR 172.863 (Salts of fatty acids — aluminum, calcium, magnesium, potassium, and sodium salts of fatty acids manufactured from edible fats and oils may be safely used in food as binder, emulsifier, and anticaking agent in accordance with cGMP) and 21 CFR 186.1770 (Indirect food-contact substance affirmed as GRAS as a constituent of paper and paperboard food packaging, adhesives 21 CFR 175.105, coatings 21 CFR 175.300, defoamers 21 CFR 176.200/176.210, textiles 21 CFR 177.2800, and lubricants 21 CFR 178.3910).

TECHNICAL COMPARISON WITH COMPETING SURFACTANTS, COLLECTORS AND WATERPROOFERS

To assist R&D formulators, mining metallurgists, and construction engineers in selecting the optimal additive, the following technical benchmark compares Sodium Oleate (CAS 143-19-1) against five competing chemical classes:

Sodium Oleate (CAS 143-19-1) vs. Unneutralized Liquid Oleic Acid (CAS 112-80-1):
- Solubility & Cold-Water Dosing: Free Oleic Acid is a water-insoluble oily liquid (< 0.01 g/L in neutral water) that floats as oil droplets unless heated with caustic soda lye in a saponification tank or emulsified with high-shear homogenizers. Dry powdered Sodium Oleate is pre-neutralized and dissolves directly in ambient cold or warm water (15 °C to 40 °C), allowing direct dry-blending into cementitious mortars, wettable powders, and solid soaps, or rapid aqueous solution makeup in mining flotation plants without handling corrosive liquid caustic soda on site.

Sodium Oleate (C18:1 cis-9, CAS 143-19-1) vs. Sodium Stearate (C18:0, CAS 822-16-2):
- Krafft Point & Cold-Water Activity: Both molecules have an 18-carbon chain and a -COONa headgroup, but saturated Sodium Stearate has a Krafft point of 60 °C to 71 °C—meaning in cold or room-temperature water (10 °C to 40 °C), Sodium Stearate is virtually insoluble (< 0.5 g/L) and cannot form micelles, wet surfaces, float minerals, or dissolve during a 60-second dry-mix mortar gauging cycle! Thanks to its cis-9 double-bond kink, Sodium Oleate has a Krafft point of 12 °C to 20 °C, dissolving up to ~100 g/L at 20 °C and delivering full surface activity, foaming, flotation collection, and in-situ mortar waterproofing in cold ambient water.

Sodium Oleate (CAS 143-19-1) vs. Calcium Stearate (CAS 1592-23-0) and Zinc Stearate (CAS 557-05-1) in Dry-Mix Mortars:
- Pore-Wall Coating Efficiency & Wetting Speed: Insoluble metallic soaps (Calcium Stearate and Zinc Stearate) are hydrophobic powders that resist wetting when water is added to dry-mix mortar, floating as dusty scum during mixing and remaining as discrete solid particles rather than molecularly coating the capillary pores. Water-soluble Sodium Oleate Powder wets instantly without dust float, dissolves into the mixing water, and reacts in situ with cement Ca2+ ions to precipitate a continuous, molecularly bonded calcium oleate barrier film across the entire internal pore surface—often paired in a 1:1 or 1:2 ratio with Calcium/Zinc Stearate for combined instant wetting and long-term water repellency.

Sodium Oleate vs. Potassium Oleate (CAS 143-18-0) and Triethanolamine Oleate (CAS 2717-15-9):
- Physical Form: Potassium Oleate and TEA-Oleate have even lower Krafft temperatures (< 0 °C) and are supplied commercially as viscous aqueous liquids or soft pastes (15% to 40% active), making them unsuitable for dry powder blends (such as dry-mix mortars, powdered detergents, or bar soaps). Sodium Oleate is the only alkali-metal oleate that can be spray-dried into a crisp, free-flowing, high-active (85% to 98%) powder with a high melting point (232 °C to 235 °

Sodium Oleate vs. Synthetic Petroleum Sulfonates and Hydroxamates in Mineral Flotation:
- Cost-Effectiveness & Selectivity: While alkyl hydroxamates are specialty chelating collectors, they cost 5 to 10 times more per kilogram than Sodium Oleate; petroleum sulfonates generate persistent, difficult-to-break froth and exhibit lower selectivity against silicate gangue. Sodium Oleate delivers the highest collector selectivity and recovery per dollar for fluorite, scheelite, apatite, spodumene, and hematite ores while remaining 100% bio-based and readily biodegradable.

PACKAGING, STORAGE AND HANDLING GUIDELINES

Because Sodium Oleate (Oleic Acid Sodium Salt, Sodium cis-9-Octadecenoate, Sodyum Oleat, CAS 143-19-1) contains an unsaturated cis-9 double bond and a hygroscopic sodium carboxylate headgroup, strict adherence to packaging, temperature, oxygen-exclusion, and dust-control guidelines is essential to prevent moisture caking, oxidative yellowing, rancid odor development, or self-heating during bulk storage:

Standard Commercial Packaging Configurations Supplied by Ataman Kimya:
- Spray-Dried Powder, Micro-Granule, and Noodle Grades (75% to 98% Active): Packaged in 20 kg or 25 kg net multi-wall kraft paper bags or woven polypropylene bags fitted with heat-sealed, low-density polyethylene (LDPE) or aluminum-foil moisture- and oxygen-barrier inner liners (standard palletization: 40 bags = 800 kg to 1,000 kg net on shrink-wrapped ISPM-15 pallets), 25 kg fiberboard drums with double PE liner bags and lever-lock lids, or 500 kg to 800 kg Flexible Intermediate Bulk Containers (FIBC Big Bags) with inner PE liners.
- High-Solids Paste and Liquid Solution Grades: Packaged in 180 kg to 200 kg net open-head high-density polyethylene (HDPE) drums or epoxy-phenolic-lined steel drums.

Warehouse Storage Conditions, Oxidation Prevention, and Self-Heating Precautions:
- Cool, Dry, Dark, and Oxygen-Protected Storage (5 °C to 25 °C): Store Sodium Oleate in a cool, dry, well-ventilated indoor warehouse at ambient temperatures between 5 °C and 25 °C (never exceeding 30 °C to 35 °C) and relative humidity below 60%, away from direct sunlight, steam pipes, heaters, and oxidizing chemicals. For ultra-pure laboratory/biochemical research grades (>= 98% assay without synthetic antioxidants), refrigerated or cold storage (-20 °C to +8 °C under inert nitrogen or argon) is recommended for multi-year preservation.
- Prevention of Allylic Autoxidation and Exothermic Self-Heating: Like all unsaturated C18:1 fatty acid soaps, finely divided spray-dried Sodium Oleate Powder has a large surface area exposed to air. If stored at elevated temperatures (> 40 °C to 50 °C) in unsealed bags or contaminated with trace transition-metal catalysts (such as iron, cobalt, manganese, or copper salts), the allylic C-8 and C-11 methylene groups adjacent to the C9=C10 double bond can undergo slow free-radical autoxidation with atmospheric oxygen. In mild cases, autoxidation causes yellowing, a tallow/rancid aldehyde odor, and reduced cold-water solubility; in severe cases (such as freshly dried hot powder packed above 55 °C into large uncooled bulk bags), exothermic autoxidation can lead to slow self-heating inside the core of the pile. Always verify that bags are stored cool (< 25–30 °C), expel excess air and tightly reseal inner polyethylene liners immediately after partial dispensing, and avoid stacking pallets more than two high to prevent pressure compaction and heat trapping.
- Hygroscopicity and Moisture Caking Control: Dry Sodium (9Z)-Octadec-9-enoate powder absorbs moisture from humid air (> 65% RH), forming a tacky surface gel film that bridges particles into lumps. Keep inner PE liners sealed until the moment of charging.

Industrial Dissolution Protocol and Materials of Construction:
- How to Dissolve Sodium Oleate Powder Rapidly Without Gel Lumps ('Fisheyes'): If dry Sodium Oleate Powder is dumped rapidly in a single heap into cold stagnant water, the outer particles hydrate into a viscous hexagonal liquid-crystalline soap gel (> 20,000 mPa.s) that encapsulates dry powder inside slow-dissolving 'fisheye' lumps. To achieve rapid, lump-free dissolution in 5 to 15 minutes: (a) heat the makeup water to 35 °C to 60 °C (well above the 20 °C Krafft point) and adjust pH to 9.5–10.5 if using raw water; (b) pre-soften hard water or add 0.1% to 0.3% sodium carbonate (Na2CO3) or chelating agent so dissolved Ca2+ does not coat the powder; and (c) sift or educt the Sodium Oleate Powder steadily into the vortex of a mechanical impeller while keeping stock solution concentration between 1.0% and 8.0% w/w (above 10% to 15% w/w at room temperature, aqueous Sodium Oleate forms a thick gel).
- Compatible Equipment Materials: Use 304 or 316L stainless steel, high-density polyethylene (HDPE), polypropylene (PP), fiberglass-reinforced plastic (FRP), or glass-lined vessels. Avoid copper, brass, bronze, zinc, aluminum (which is attacked by alkaline soap solutions at pH > 9.5), and unlined rusty carbon steel.

Shelf Life:
When stored unopened in its original factory-sealed moisture- and oxygen-barrier packaging at 5 °C to 25 °C away from light and heat, stabilized commercial grades of Sodium Oleate maintain full specification compliance for 12 to 24 months from the date of manufacture.

FIRST AID MEASURES, TOXICOLOGICAL PROFILE AND SAFETY INFORMATION

Sodium Oleate (Oleic Acid Sodium Salt, INCI: SODIUM OLEATE, E470a, CAS 143-19-1) is a biodegradable, low-toxicity natural fatty acid soap with a long history of safe use in consumer bar soaps, cosmetics, and food-related applications. However, in industrial manufacturing settings, neat concentrated Sodium Oleate powder, granules, or alkaline stock solutions (pH 9.5 to 11.0) can cause eye irritation, mild skin irritation upon prolonged contact, and upper respiratory sneezing/coughing if fine soap dust is inhaled:

GHS / CLP Hazard Classification and Toxicological Profile (Regulation (EC) No 1272/2008):
- GHS Classification: Depending on free alkali content and supplier REACH notification, neat technical or pure Sodium Oleate is either not classified as a hazardous substance or classified under Eye Irritant Category 2 / 2A (H319: Causes serious eye irritation) and Skin Irritant Category 2 (H315: Causes skin irritation) / Specific Target Organ Toxicity — Single Exposure Category 3 (H335: May cause respiratory irritation from fine soap dust). Signal Word (when classified): Warning.
- Acute Toxicity Metrics: Practically non-toxic by oral ingestion and dermal contact: Acute Oral LD50 (rat/mouse) > 5,000 to 10,000 mg/kg body weight (intravenous LD50 in mouse = 152 mg/kg due to red blood cell hemolysis when injected directly into the bloodstream); Acute Dermal LD50 (rabbit) > 2,000 mg/kg. Non-mutagenic in Ames bacterial reverse mutation tests (OECD 471), non-carcinogenic, and non-sensitizing.

First Aid Measures for Eye Contact:
If dry Sodium Oleate Powder, granules, or alkaline aqueous solutions of Oleic Acid Sodium Salt enter the eyes, immediately flush the eyes with plenty of lukewarm, gently flowing potable water or sterile isotonic saline eyewash solution for at least 15 minutes, holding the upper and lower eyelids wide open to irrigate all conjunctival surfaces. Remove contact lenses after the first 5 minutes if present and easy to do, then continue rinsing. Because alkaline soap solutions (pH 9.5 to 11.0) cause immediate stinging, conjunctival redness, and tearing, consult a physician or ophthalmologist if ocular pain or irritation persists.

First Aid Measures for Inhalation of Soap Dust:
Fine airborne dust of spray-dried Sodium cis-9-Octadecenoate is a sternutator (induces sneezing and nasal tickling) and can irritate the mucous membranes of the nose, throat, and upper airways. If a worker inhales airborne dust of Sodyum Oleat during bag dumping or dry-mortar mixing, immediately move the person into fresh air and keep them comfortable and at rest. Have the individual blow their nose gently and rinse their mouth and throat with clean water. Obtain medical attention if coughing, wheezing, or respiratory discomfort continues.

First Aid Measures for Skin Contact:
If neat Sodium Oleate powder or concentrated paste contacts the skin, brush off excess dry powder, remove dust-soiled clothing, and rinse the skin thoroughly with plenty of running water until all slippery soap film is removed. While diluted Sodium Oleate is a gentle skin cleanser, prolonged occupational contact with concentrated alkaline soap powder (pH 10 to 11) defats the stratum corneum and can cause dry, chapped, or reddened skin; apply a barrier emollient cream after washing and launder contaminated work clothes before reuse.

First Aid Measures for Accidental Ingestion:
If a significant industrial quantity of Sodium (9Z)-Octadec-9-enoate is accidentally swallowed, rinse the mouth thoroughly with water and spit out the rinse water, then have the conscious person drink 1 to 2 small glasses (150 to 250 mL) of water or milk to dilute the soap in the stomach. Do NOT induce vomiting! Vomiting a foaming soap solution carries a serious risk of aspirating foam into the lungs (chemical pneumonitis). Seek medical advice if large quantities are ingested or if nausea, abdominal cramping, or mild osmotic diarrhea occurs.

Personal Protective Equipment (PPE), Dust Control, and Spill Response:
- Workplace Ventilation & Respiratory Protection: Provide Local Exhaust Ventilation (LEV) at bag-dumping hoppers, ribbon blenders, and weighing booths to keep airborne dust below occupational nuisance dust limits (OSHA PEL / ACGIH TLV: 10 mg/m3 inhalable dust, 3 mg/m3 respirable dust). Operators handling open bags of fine Sodium Oleate Powder should wear a fitted EN 149 FFP2 or NIOSH N95 disposable particulate respirator.
- Eye, Hand, and Body Protection: Wear tightly fitting dust- and splash-resistant safety goggles (EN 166 / ANSI Z87.1), impervious nitrile, neoprene, or natural rubber gloves (EN 374), long-sleeved work coveralls, and anti-slip safety boots.
- Firefighting & Spill Cleanup Warning (Extreme Slip Hazard): Extinguish fires involving packaging or bulk Sodium Oleate using water fog, foam, dry chemical powder (ABC), or CO2 (avoid high-pressure water jets on dry powder piles, which can loft combustible dust clouds and create treacherous slippery foam). During spill cleanup, NEVER flush spilled dry Sodium Oleate Powder directly with water hoses first! Wet Sodium Oleate forms an extremely slick, gelatinous soap film on concrete and tile floors that causes severe fall injuries. Always sweep or vacuum up spilled dry Sodium Oleate Powder completely in the dry state using an industrial HEPA vacuum or dry shovel into salvage drums, and only wash the final trace residue with warm water and calcium chloride or detergent afterward.

REGULATORY STATUS, BIODEGRADABILITY AND GLOBAL COMPLIANCE

Sodium Oleate (CAS 143-19-1, EC 205-591-0, INCI: SODIUM OLEATE, E470a) holds broad regulatory clearances and exemptions across global chemical inventories, food additive frameworks, cosmetic directives, and environmental standards:

Global Chemical Inventories and EU REACH Status:
Listed and active on all major international chemical inventories: European Union EINECS (205-591-0), United States TSCA (Active, 8b), Canada DSL, Australia AIIC, China IECSC and IECIC (Cosmetic Inventory), Japan ENCS (2-611 / 2-609) and ISHL, South Korea KECI (KE-26458), Philippines PICCS, New Zealand NZIoC, and Taiwan TCSI. Under EU REACH Regulation (EC) No 1907/2006, Annex V (Entry 9), sodium, potassium, and calcium salts of natural fatty acids (C6 to C24, including Sodium Oleate obtained from natural vegetable oils or animal fats) are exempted from mandatory REACH registration when not chemically modified.

Food Additive (E470a) and U.S. FDA Food-Contact Clearances:
- European Union & Codex Alimentarius (E470a / INS 470(i)): Authorized as Food Additive E 470a (Sodium, potassium and calcium salts of fatty acids) under Regulation (EC) No 1333/2008 and Commission Regulation (EU) No 231/2012, with an Acceptable Daily Intake (ADI) of 'Not Specified' (group ADI with fatty acids) established by JECFA and EFSA.
- U.S. Food and Drug Administration (21 CFR): Approved as a direct food additive under 21 CFR 172.863 (Salts of fatty acids — binder, emulsifier, and anticaking agent in food in accordance with cGMP), affirmed as GRAS for indirect food-contact paper and paperboard packaging under 21 CFR 186.1770, and cleared under 21 CFR 175.105 (Adhesives), 21 CFR 175.300 (Resinous and polymeric coatings), 21 CFR 176.170 / 176.200 / 176.210 (Paperboard components and defoamers), and 21 CFR 177.2600 / 177.2800 (Rubber articles and textiles).

U.S. EPA Pesticide Inert Ingredient Exemption (40 CFR Part 180):
Cleared by the U.S. Environmental Protection Agency under 40 CFR 180.910 and 40 CFR 180.930 as an inert ingredient (surfactant, emulsifier, and wetting agent) applied to growing crops, raw agricultural commodities after harvest, or animals with an exemption from the requirement of a residue tolerance.

Cosmetics Regulation (INCI: SODIUM OLEATE) and U.S. CIR Assessment:
Approved without restriction in the European Union under Regulation (EC) No 1223/2009 (CosIng Functions: Cleansing, Emulsifying, Surfactant, Viscosity Controlling) and assessed as Safe as Used by the U.S. Cosmetic Ingredient Review (CIR) Expert Panel in the Safety Assessment of Oleic Acid, Lauric Acid, Palmitic Acid, Myristic Acid, and Stearic Acid and Their Salts.

Biodegradability and Ecotoxicological Profile:
Readily biodegradable under OECD Test Guideline 301B and 301D, achieving 85% to 95% ultimate mineralization to CO2 and H2O within 28 days (rapidly cleaved via microbial beta-oxidation of the C18:1 fatty acid chain). In natural surface waters containing dissolved Ca2+ and Mg2+ hardness ions, trace discharged Sodium Oleate rapidly precipitates as non-bioavailable, non-toxic calcium/magnesium oleate salts that are degraded by sediment microorganisms.

FREQUENTLY ASKED QUESTIONS (FAQ)

What is Sodium Oleate (CAS 143-19-1) and how is it chemically structured?
Sodium Oleate (also known as Oleic Acid Sodium Salt, Sodium cis-9-Octadecenoate, Sodium (9Z)-Octadec-9-enoate, E470a, and Sodyum Oleat) is an anionic monounsaturated fatty acid carboxylate surfactant with the molecular formula C18H33NaO2 and a molecular weight of 304.44 g/mol. It consists of an 18-carbon hydrocarbon chain containing a rigid cis-9 double bond (CH3(CH2)7CH=CH(CH2)7-) attached to a hydrophilic sodium carboxylate headgroup (-COONa), produced by neutralizing renewable vegetable or tallow oleic acid with sodium hydroxide.

Why does Sodium Oleate dissolve in room-temperature water (20 °C) whereas Sodium Stearate requires hot water (> 65 °C)?
Although both Sodium Oleate (C18:1 cis-9) and Sodium Stearate (C18:0) contain 18 carbon atoms, saturated Sodium Stearate has a linear, all-trans zig-zag hydrocarbon tail that packs into rigid crystalline bilayers with a Krafft point of 60 °C to 71 °C—making it insoluble in cold or warm water. By contrast, the cis-9 double bond in Sodium Oleate introduces a permanent 120-degree kink in the middle of the C18 chain that disrupts crystalline lattice packing, lowering its Krafft temperature to 12 °C to 20 °C and allowing it to dissolve up to ~100 g/L at 20 °C.

Why do aqueous solutions of Sodium Oleate sometimes appear slightly cloudy or opalescent in pure water, and how can they be made crystal-clear?
Because oleic acid is a weak carboxylic acid with an apparent micellar pKa of 7.5 to 8.5, dissolving Sodium Oleate in unbuffered neutral water (pH 7.0) causes partial conjugate-base hydrolysis (C17H33COO- + H2O <-> C17H33COOH + OH-). The liberated trace oleic acid pairs with ionized oleate anions to form sub-micron vesicles of the 1:1 acid-soap dimer (NaH(C18H33O2)2), imparting a pearlescent opalescence. Raising the solution pH to 10.5–11.0 with a trace of sodium hydroxide or adding 10% to 20% ethanol suppresses hydrolysis and yields a water-white, optically transparent solution.

How does Sodium Oleate function as a collector in the froth flotation of fluorite, scheelite, apatite, spodumene, and hematite ores?
When dosed at 100 to 1,000 g/t into alkaline mineral flotation pulps (pH 8.0 to 10.0), the negatively charged carboxylate headgroup (-COO-) of Sodium Oleate chemisorbs onto exposed Ca2+, Fe3+, Al3+, or rare-earth cations on the mineral surface via bidentate inner-sphere coordination, while the kinked C18:1 hydrocarbon tails orient outward to form a dense hydrophobic semi-micelle monolayer. This raises the mineral-water contact angle to 90–105 degrees, causing air bubbles to attach selectively to the valuable mineral particles and float them into the concentrate froth.

Why is spray-dried Sodium Oleate Powder preferred over Calcium Stearate as an integral waterproofing agent in dry-mix mortars and renders?
Pre-formed Calcium Stearate is completely insoluble in cold water (melting point 150 °C), so during a brief 60-second jobsite mixing cycle it remains as discrete solid particles and cannot coat capillary pore walls uniformly. Spray-dried Sodium Oleate Powder (0.05% to 0.40% w/w) dissolves immediately into the cold mixing water, migrates throughout the entire capillary pore network, and reacts in situ with dissolved Ca2+ ions released by hydrating Portland cement to precipitate a continuous, molecularly bonded hydrophobic calcium oleate lining on every pore wall.

How do you dissolve Sodium Oleate Powder quickly in industrial tanks without forming viscous gel lumps?
To prevent dry powder from hydrating into slow-dissolving liquid-crystalline 'fisheye' gel lumps, warm the makeup water to 35 °C to 60 °C, pre-treat hard water with 0.1% to 0.2% sodium carbonate or a chelator so Ca2+ ions do not precipitate calcium soap skins around the powder particles, and sift the Sodium Oleate Powder steadily into the vortex of a mechanical agitator at a stock concentration of 1% to 8% w/w.

What role does Sodium Oleate play in emulsion polymerization of SBR and NBR synthetic rubbers?
Dosed at 2.0 to 5.0 parts per hundred monomer (phm) at pH 9.5 to 10.8, Sodium Oleate forms monomer-swollen micelles (CMC ~1.5 mM) that nucleate and stabilize uniform 50 to 150 nm latex particles during styrene-butadiene (SBR) and nitrile-butadiene (NBR) polymerization. After polymerization, acidifying the latex below pH 4.5 converts the soluble Sodium Oleate emulsifier into insoluble free oleic acid, cleanly coagulating the rubber crumb while leaving the oleic acid inside the elastomer as a built-in vulcanization activator.

Why must Sodium Oleate Powder be stored in sealed, cool containers away from heat and air?
Because Sodium Oleate contains an unsaturated cis-9 carbon-carbon double bond, prolonged exposure of open bags to warm air (> 35 °C to 40 °C), sunlight, and humidity can trigger free-radical autoxidation at the allylic carbons—causing yellowing, rancid tallow off-odors, moisture caking, and in large uncooled bulk piles, slow exothermic self-heating. Storing sealed polyethylene-lined bags at 5 °C to 25 °C preserves white color, fresh soap odor, and full cold-water solubility for 12 to 24 months.

Why should dry Sodium Oleate Powder spills always be swept or vacuumed dry before washing floors with water?
When dry Sodium Oleate Powder contacts water on smooth concrete, epoxy, or tile factory floors, it immediately hydrates into a slick, gelatinous liquid-crystalline soap film with an extremely low coefficient of friction, creating a severe slip-and-fall hazard. Always vacuum or shovel up spilled powder completely in the dry state first, and only wash the final trace film with warm water afterward.

Is Sodium Oleate available in 100% Vegetable-Derived (Tallow-Free), Halal, Kosher, and Food-Contact grades from Ataman Kimya?
Yes, Ataman Kimya supplies both 100% Vegetable-Derived Sodium Oleate (synthesized from fractionated olive, high-oleic sunflower, or palm olein oleic acid—completely tallow-free, BSE/TSE-free, Vegan, Halal, and Kosher compliant for INCI cosmetics, E470a food applications, and low-titer flotation) and economical Technical Tallow/Vegetable grades for heavy industrial flotation, waterproofing, and lubricants.

TECHNICAL SUMMARY

Sodium Oleate (CAS 143-19-1, EC 205-591-0, UNII-399SL044HN, C18H33NaO2, MW 304.44 g/mol, INCI: SODIUM OLEATE, Food Additive E470a)—traded globally under its core chemical and industrial synonyms Oleic Acid Sodium Salt, Sodium cis-9-Octadecenoate, Sodium (9Z)-Octadec-9-enoate, 9-Octadecenoic Acid (9Z)-, Sodium Salt, Monosodium Oleate, Eunatrol, and Sodyum Oleat (Oleik Asit Sodyum Tuzu)—is the premier monounsaturated C18:1 anionic carboxylate surfactant, mineral flotation collector, and reactive construction waterproofing agent in modern industrial chemistry. Because its cis-9 olefinic double bond introduces a permanent 120-degree kink into the 18-carbon hydrophobic tail, Sodium Oleate depresses the Krafft temperature down to 12 °C to 20 °C, achieves an equilibrium surface tension of 25.0 to 28.5 mN/m above a low CMC of 1.0 to 2.1 mmol/L, and dissolves readily in ambient water where saturated C18 sodium stearate remains insoluble.

Whether your manufacturing operations require fine spray-dried Sodium Oleate Powder for dry-mix waterproof mortars, renders, tile grouts, and concrete admixtures, high-activity collector grades for fluorite, scheelite, apatite, spodumene, and iron ore froth flotation, 100% vegetable-derived Cosmetic and Food grades (INCI SODIUM OLEATE / E470a) for Castile soaps, translucent deodorant sticks, and O/W emulsions, or low-electrolyte grades for SBR/NBR emulsion polymerization, latex sponge foaming, textile waterproofing and scouring, and metalworking wire-drawing lubricants, Ataman Kimya delivers reliable, batch-consistent supply in 20–25 kg moisture-barrier lined bags, fiber drums, and FIBC bulk bags. Formulators, mining engineers, R&D chemists, and procurement specialists seeking Sodyum Oleat (Sodium Oleate / Oleic Acid Sodium Salt) can contact Ataman Kimya directly for Technical Data Sheets (TDS), Safety Data Sheets (SDS), Certificates of Analysis (COA), grade selection support, and competitive commercial quotations.

Ataman Chemicals
Phone: +90 216 577 10 10
Email: info@atamankimya.com