E470a CALCIUM STEARATE

E470a Calcium Stearate is the calcium salt of stearic acid, a white to yellowish-white, fine, waxy, odorless powder classified as a metallic soap and a carboxylate of calcium, produced by heating stearic acid with calcium oxide or by reaction of calcium chloride with sodium stearate, with the molecular formula Ca(C₁₇H₃₅COO)₂, melting point 150–160°C, density 1.08–1.12 g/cm³, and practically insoluble in water (0.004 g/100 mL at 15°C), alcohol, and ether, while soluble in hot pyridine and slightly soluble in hot vegetable and mineral oils.
E470a Calcium Stearate functions simultaneously as an anti-caking agent, internal and external lubricant, mold release agent, acid scavenger (halogen neutralizer), heat-stabilizing auxiliary, waterproofing agent, flow aid, emulsifier, stabilizer, thickener, surface modifier, and pigment dispersant across food, plastics, rubber, construction, pharmaceutical, cosmetic, paper, coating, and textile industries, making it one of the most versatile multifunctional metallic soap additives in commercial use.
E470a Calcium Stearate is approved as a food additive in the European Union under Regulation (EC) No 1333/2008 with E number E470a (sodium, potassium, and calcium salts of fatty acids), classified as Generally Recognized as Safe (GRAS) by the US FDA under 21 CFR 184.1229 and multiple other CFR citations, assigned an ADI of "not specified" by JECFA (JECFA Meeting 29, 1985), and registered under REACH with EC number 216-472-8, with no carcinogenicity, mutagenicity, reproductive toxicity, or skin sensitization classification.

CAS Number: 1592-23-0
EC Number: 216-472-8
Molecular Formula: C₃₆H₇₀CaO₄
Molecular Weight: 607.02 g/mol

Synonyms: Calcium Distearate, Calcium Octadecanoate, Calcium Dioctadecanoate, Calcium Bis(stearate), Stearic Acid Calcium Salt, Octadecanoic Acid Calcium Salt, Calcium Soap, E470a, INS 470(i), Calstar, Aquacal, Flexichem CS, Stavinor 30, Witco G 339S, Nopcote C 104, Arestab CA, Ceasit I, Darapel, Daiwax C, Synpro Stearate, Radiastar 1060, Baerlocher 5862, Parteck LUB-CST, Listab Ca, Leaguestar 600, Nissan Calcium Stearate S, CAS 1592-23-0

E470a Calcium Stearate is derived from stearic acid — a naturally occurring saturated C18 fatty acid present in the glycerides of animal fats and vegetable oils — with common vegetable sources including palm oil, soybean oil, coconut oil, cocoa butter, corn oil, and olive oil, and common animal sources including beef tallow, mutton tallow, and lard; most commercial E470a Calcium Stearate is produced from vegetable-derived stearic acid, and vegetable-based grades are suitable for halal, kosher, vegetarian, and vegan-label applications.
E470a Calcium Stearate is produced commercially by a dry fusion process in which palm-derived or other vegetable stearic acid is reacted with calcium oxide (lime) at elevated temperature — 2C₁₇H₃₅COOH + CaO → (C₁₇H₃₅COO)₂Ca + H₂O — or alternatively by reacting calcium chloride with sodium stearate in aqueous solution — CaCl₂ + 2C₁₇H₃₅COONa → (C₁₇H₃₅COO)₂Ca↓ + 2NaCl — followed by filtration, drying, and milling to the required particle size and form.

E470a Calcium Stearate is structurally composed of a calcium cation (Ca²⁺) ionically bonded to two stearate anions (C₁₇H₃₅COO⁻), forming a molecule with 36 carbons total; the divalent Ca²⁺ binding two non-polar fatty acid chains explains its water insolubility, as the two C17 chains prevent Ca²⁺ from interacting with water molecules, unlike monovalent Na⁺ or K⁺ stearates which bind only one chain and are water-soluble.
E470a Calcium Stearate is identified in the PubChem database (CID 15324) with InChIKey CJZGTCYPCWQAJB-UHFFFAOYSA-L, SMILES CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Ca+2], UNII 776XM7047L, ChEBI CHEBI:190296, ChEMBL ChEMBL2106092, CompTox DTXSID7027419, Beilstein/REAXYS 3919698, MDL MFCD00036390, and topological polar surface area 80.3 Ų, hydrogen bond donors 0, hydrogen bond acceptors 4, rotatable bond count 30, and exact mass 606.490 g/mol.

Uses of E470a Calcium Stearate:
E470a Calcium Stearate is used in the food industry as an anti-caking agent in dry food mixes, spices, salt, snack foods, confections, soft and hard candies (including Smarties, jawbreakers, and Sprees as a flow agent and surface conditioner), bakery products, dietary supplements, calcium supplements, chewing gum and mints (forming a thin fatty film preventing gum from sticking to equipment, packaging, or teeth), fats and oils, meat products, fish products, and dehydrated powder products where it prevents moisture absorption and clumping and maintains free-flowing properties.
E470a Calcium Stearate is used in bakery applications as a dough conditioner functioning as a free-flowing agent, reducing bakery dust and minimizing airborne ingredient particles that may be harmful to bakery workers by inhalation, commonly used in flour enrichment and dough conditioning products in combination with other dough softeners such as mono- and diglycerides, and used in flour mills to prevent dusting and improve the manageability of flour-based ingredients.

E470a Calcium Stearate is used as a lubricant, mold release agent, and anti-adherent in pharmaceutical tablet and capsule manufacturing at dosage levels of approximately 0.5–2%, preventing active ingredients and excipients from sticking to punches, dies, and capsule-filling machinery, ensuring smooth compression and consistent tablet weight and shape; it is also used as an anti-caking agent, gelling agent, and excipient to improve the solubility and bioavailability of drugs in pharmaceutical formulations.
E470a Calcium Stearate is used in cosmetics and personal care products including face powders, body powders, pressed powders, foundations, blushers, and eyeshadows as a lubricant, thickener, adhesion promoter, and anti-caking agent that enhances powder adhesion, ensures even spreading, and improves compactability; in skincare creams and lotions as a thickener and emulsion stabilizer; in toothpaste as an abrasive and emulsifier; and in bar soaps as a component.

E470a Calcium Stearate is used in the plastics industry as a multifunctional additive incorporated into resins at 0.5–2% via high-speed mixing, functioning simultaneously as a non-toxic heat stabilizer for PVC (neutralizing hydrochloric acid released during thermal processing: 2HCl + Ca(stearate)₂ → CaCl₂ + 2 stearic acid), internal and external lubricant, mold release agent, acid scavenger (halogen scavenger), pigment wetting agent, and processing aid in PVC, PE, PP, PS, ABS, PA, EVA, SMC/BMC, and thermosetting plastic formulations.
E470a Calcium Stearate is used in PVC applications including pipes and fittings, profiles, wire and cable compounds, film and sheet, hose and tube, and rigid extrusion formulations where it improves thermal processing stability, accelerates fusion, reduces die swell, improves flow, reduces plate-out, and neutralizes acidic HCl degradation products; it is also used in masterbatch, pigment, and colorant concentrates to improve pigment wetting and dispersion and to improve lubrication and reduce binder resin requirements.

E470a Calcium Stearate is used in the rubber industry at 1–3% dosage uniformly mixed with the rubber compound as a lubricant, mold release agent, plasticizer, and processing aid to improve processing flow, surface finish, and demolding in the manufacture of rubber seals, gaskets, tubing, automotive floor mats, drainage pipes, and molded rubber products; it also prevents scorching during vulcanization and reduces energy consumption during mixing.
E470a Calcium Stearate is used in construction materials including cement, gypsum, and dry-mix mortars at less than 1% as a waterproofing agent and water reducer that significantly improves water-repellent properties of mixtures, limits efflorescence (white salt deposits) in cementitious products such as paving tiles and concrete blocks, and is used in prefabricated concrete (emulsion form), mortars, putties, floors, terrazzo, ceramic tiling, and waterproofing applications.

E470a Calcium Stearate is used in paints, coatings, and inks as a matting agent (flatting agent), anti-settling agent, dispersant, rheology modifier, and thickener; in paper production as a lubricant for coated paper and coating formulations at low cost to enhance paper gloss, smoothness, and hydrophobicity, prevent dusting and fold cracking in paper and paperboard, and extend paper service life; and in pencils and wax crayons as a lubricant.
E470a Calcium Stearate is used in wire drawing as a dry lubricant in the dry-drawing method of metal wire production; in textiles and footwear to provide impermeability and waterproofing to fabrics, footwear, and rock wool insulation; in antifoaming agent formulations (at 0.5–1% of solid matter) as a component of defoamers; and in fertilizer, detergent, and chemical powder formulations as an anti-caking agent.

E470a Calcium Stearate is used in flame retardant material production at approximately 2% concentration alongside zinc stearate as a stabilizer and lubricant in the manufacture of flame retardant panels, false ceilings, and composite construction products including sound-proofing materials.
E470a Calcium Stearate is used as a lubricant in extrusion and laminating processes for plastics and metals at 0.3–1.0% addition in the feed hopper, improving product homogeneity, reducing hot spots and energy consumption, and providing raw material savings; in metal foundry operations as a lubricant for resin-sand mixture compaction; in wood plastic composites to enhance flow and processing efficiency; and in recycled polymer processing to neutralize acids from degraded polymers.

Benefits or Advantages of E470a Calcium Stearate:
E470a Calcium Stearate is a truly multifunctional additive delivering simultaneous anti-caking, lubrication, mold release, acid scavenging, heat stabilization, waterproofing, and dispersing functionality in a single additive, reducing the number of separate additives required across food, plastics, rubber, construction, and cosmetic formulations.
E470a Calcium Stearate has very low acute toxicity, is non-carcinogenic, non-mutagenic, non-reproductive toxic, and non-skin sensitizing; it is metabolized in the gastrointestinal tract into stearic acid and calcium cation which are both naturally metabolized as normal dietary components (stearate via β-oxidation and the Krebs cycle; calcium with approximately 30% absorption), and JECFA has assigned an ADI of "not specified" reflecting the absence of toxicological concern at food-relevant intakes.

E470a Calcium Stearate has excellent thermal stability, remaining stable at 160–180°C during high-temperature polymer and PVC processing, and decomposing only above approximately 435°C, making it a reliable processing aid across the temperature ranges encountered in typical industrial processing.
E470a Calcium Stearate is a non-lead, non-heavy-metal PVC heat stabilizer offering a safer, environmentally compliant alternative to traditional lead-based PVC stabilizers, and is compatible with all major polymer types including PVC, PE, PP, PS, ABS, PA, EVA, SBR, and engineering plastics.

E470a Calcium Stearate is available in vegetable-derived, non-GMO, halal-certified, and kosher-certified grades from major producers, and is approved as GRAS (FDA), E470a (EU), INS 470(i) (Codex Alimentarius), and in compliance with USP/BP/EP/FCC/NF pharmacopeial standards for pharmaceutical-grade material.
E470a Calcium Stearate is available in multiple physical forms — fine powder, coarse powder, granule/bead, and emulsion — providing handling flexibility for different compounding and processing methods; the emulsion form is particularly valued for construction applications where homogeneous spread is required.

Features of E470a Calcium Stearate:
E470a Calcium Stearate is a white to yellowish-white (ivory, cream), fine, free-flowing, waxy, odorless (slight characteristic fatty odor), bulky powder with a density of approximately 1.08–1.12 g/cm³, bulk density approximately 200–300 g/L, melting point 150–160°C (varying by grade and fatty acid composition), boiling point 359.4°C at 760 mmHg, flash point 162.4°C, and decomposition temperature approximately 435°C.
E470a Calcium Stearate is practically insoluble in water (0.004 g/100 mL at 15°C; insoluble in cold alcohol, ether, chloroform, and acetone), slightly soluble in hot alcohol and hot vegetable and mineral oils, and soluble in hot pyridine; unlike sodium and potassium stearates it does not dissolve in water and does not lather, forming dispersions rather than solutions in aqueous media.

E470a Calcium Stearate has a hydrophobic character (XLogP3 approximately 12.51), strongly repels water, and forms stable microfilms on powder surfaces, substrate surfaces, and mold surfaces that provide the lubrication, release, and moisture barrier properties underlying its diverse functional applications.
E470a Calcium Stearate is available in multiple commercial grades with varying calcium content (5.8–11.07%), ash content (9.0–15.5%), free fatty acid content (≤0.5–3.0%), moisture (≤1.0–3.0%), melting point (145–160°C), and density (200–320 g/L), including food grade (FCC), pharmaceutical grade (USP/BP/EP/NF), standard industrial grade (CS-10, CS-12, CS-15), pharma lubricant grade (CS-P, CS-HS), and specialty thermostable high-temperature grades.

Chemical Properties of E470a Calcium Stearate:
E470a Calcium Stearate has the IUPAC name calcium bis(octadecanoate) and systematic name calcium di(octadecanoate), the molecular formula C₃₆H₇₀CaO₄ (or C₃₆H₇₀O₄Ca, exact mass 606.490 g/mol), consisting of a calcium cation (Ca²⁺) ionically bonded to two octadecanoate (stearate) anions, making it a salt of the C18 saturated fatty acid stearic acid; commercial calcium stearate may also contain calcium palmitate (C16 fatty acid salt) as a minor component.
E470a Calcium Stearate is chemically stable under normal handling and storage conditions and does not decompose under ordinary use; it is incompatible with strong acids (which convert it to free fatty acids and calcium salts) and strong oxidizing agents; it does not react with water under normal conditions but dissociates in the gastrointestinal tract into stearic acid carboxylate and calcium cation (Ca²⁺).

E470a Calcium Stearate reacts as a base (calcium soap) with strong acids, and as a neutralizer with hydrochloric acid and other halogen acids released during PVC thermal processing; fine dry powder presents a combustible dust hazard in air under specific conditions (minimum ignition energy >4 J) but is not classified as explosive in bulk form.
E470a Calcium Stearate does not undergo hazardous polymerization; thermal decomposition above 435°C produces carbon monoxide, carbon dioxide, calcium oxide (or calcium carbonate), fatty acid decomposition products, and irritating organic fumes.

Production of E470a Calcium Stearate:
E470a Calcium Stearate is produced industrially primarily by the dry fusion process in which stearic acid (typically palm-derived, soybean-derived, or tallow-derived) is heated with calcium oxide (lime) in a controlled reaction vessel at elevated temperature, forming calcium stearate and water, with the product discharged, cooled, and milled to the required particle size distribution; no organic solvents are used in this process.
E470a Calcium Stearate is also produced by a wet precipitation process in which sodium stearate solution and calcium chloride solution are reacted in aqueous medium, precipitating calcium stearate as a white solid that is then filtered, washed, and dried; this process is more suitable for laboratory and specialty production than for large-scale industrial manufacture.

E470a Calcium Stearate quality is controlled through verification of calcium content (5.8–7.5% for standard grades), ash content, free fatty acid content, loss on drying, melting point, fineness (≥99% through 200 mesh), iodine number, heavy metals (≤0.004% as Pb), chloride (≤200 mg/kg), sulfate (≤1,000 mg/kg), arsenic (≤1–3 mg/kg), lead (≤2 mg/kg), and microbiological parameters for food grades.
E470a Calcium Stearate is packaged in 20–25 kg polyethylene-lined paper bags, and is available in powder, granule/bead, and emulsion (50% dispersion in water) forms; storage requires cool, dry, well-ventilated conditions at 15–30°C in tightly sealed packaging protected from moisture, heat, direct sunlight, and strong odors; shelf life is typically 24–36 months.

Material Safety Data Sheet (MSDS) of E470a Calcium Stearate:

Handling of E470a Calcium Stearate:
E470a Calcium Stearate should be handled in accordance with good industrial hygiene practices and in compliance with the applicable Safety Data Sheet; the primary handling hazards are mechanical dust irritation to eyes, nose, throat, and respiratory tract, and the combustible dust fire hazard from fine airborne powder in confined spaces.
E470a Calcium Stearate handling requires avoiding dust generation, using local exhaust ventilation at bag opening and powder transfer points, wearing appropriate respiratory and eye protection where dust is generated, maintaining effective housekeeping to prevent dust accumulation on elevated surfaces and equipment, and keeping powder away from strong ignition sources.

SDS of E470a Calcium Stearate:

Stability and Reactivity of E470a Calcium Stearate:

Chemical stability:
E470a Calcium Stearate is stable under recommended storage and handling conditions at 15–30°C in sealed dry packaging.

Reactivity:
E470a Calcium Stearate may react with strong acids (releasing free fatty acids and forming calcium salts) and strong oxidizing agents.
Finely dispersed powder can form combustible dust concentrations in air under specific ignition conditions.

Conditions to avoid:
Excessive heat above 160°C during storage (melting and quality degradation).
Dust-cloud formation and dust accumulation on surfaces (combustible dust risk).
Open flames and strong ignition sources.
Contact with strong oxidizing agents.
Contact with strong acids.
Moisture during storage (may cause caking in hygroscopic applications).

Incompatible materials:
Strong oxidizing agents.
Strong acids.
Highly reactive chemicals.

Hazardous decomposition products:
Carbon monoxide (CO).
Carbon dioxide (CO2).
Calcium oxide or calcium carbonate (inorganic residue).
Fatty acid decomposition products.
Irritating organic fumes (under fire or severe overheating conditions).

Handling and Storage of E470a Calcium Stearate:

Handling:
Handle in accordance with good industrial hygiene and food safety practices.
Avoid generating airborne dust; use local exhaust ventilation at powder transfer points.
Wear safety glasses with side protection where dust is possible; use sealed goggles in heavy dust environments.
Wear suitable particulate respirator where dust generation cannot be adequately controlled by ventilation.
Do not eat, drink, or smoke in industrial handling areas.
Wash hands thoroughly after handling.
Maintain effective housekeeping; do not allow dust to accumulate on elevated surfaces, beams, or equipment.
Do not use compressed air to clean calcium stearate dust from surfaces.
Clean powder from floors immediately as it creates a slippery surface.

Storage:
Store in a cool (15–30°C), dry, well-ventilated area in tightly sealed original packaging.
Protect from moisture, direct sunlight, excessive heat, and strong odors.
Keep away from strong oxidizing agents and strong acids.
Food-grade E470a Calcium Stearate must be stored separately from non-food chemicals and protected from contamination.
Packaging: 20–25 kg polyethylene-lined kraft paper bags; flexible IBCs; 50% dispersion in water (emulsion form).
Shelf life: 24–36 months in original sealed packaging under recommended conditions.

First Aid Measures of E470a Calcium Stearate:

Inhalation:
Move affected person to fresh air.
Rinse mouth and nose after significant dust exposure.
Seek medical attention if coughing, breathing difficulty, or persistent throat irritation develops.

Skin contact:
Wash affected skin with soap and water.
Remove contaminated clothing.
E470a Calcium Stearate is not generally expected to cause significant skin irritation; seek medical advice if dryness or irritation persists.

Eye contact:
Rinse immediately with plenty of clean water for at least several minutes while holding eyelids open.
Remove contact lenses if present and easy to remove.
Seek medical attention if irritation, redness, or foreign-body sensation persists.

Ingestion:
E470a Calcium Stearate has low acute oral hazard; food-grade calcium salts of fatty acids are approved food additives.
Rinse mouth with water.
Do not induce vomiting unless advised by medical personnel.
Seek medical advice if large quantities are ingested or gastrointestinal symptoms develop.

Firefighting Measures of E470a Calcium Stearate:

Suitable extinguishing media:
Dry chemical powder, foam, carbon dioxide, water spray, or water fog.

Specific hazards:
E470a Calcium Stearate is combustible (flash point 162.4°C); finely dispersed powder can form combustible dust concentrations in air.
Do not use methods that disperse accumulated settled powder during firefighting.
Combustion produces carbon monoxide, carbon dioxide, calcium-containing residues, fatty acid decomposition products, and irritating organic fumes.

Protective equipment for firefighters:
Wear self-contained breathing apparatus (SCBA) and full protective clothing.

Firefighting instructions:
Avoid dispersing accumulated dust; control ignition sources.
Cool exposed containers with water spray.
Prevent contaminated firefighting water from entering drains or waterways.

Accidental Release Measures of E470a Calcium Stearate:

Personal precautions:
Avoid dust formation and inhalation of airborne particles; wear dust mask.
Control ignition sources if large quantities of fine dust are released.
Spilled powder creates a slipping hazard on floors; contain immediately.
Use industrial vacuum suitable for fine powders; avoid sweeping methods that disperse dust.

Environmental precautions:
Prevent large quantities from entering drains or surface water.
E470a Calcium Stearate has very low water solubility; large releases may produce hydrophobic deposits.

Methods for cleaning up:
Carefully sweep or vacuum using an industrial vacuum; avoid methods generating airborne dust.
Do not use compressed air for cleanup.
Transfer collected material to labeled waste containers.
Dispose according to local regulations; uncontaminated product may be recovered for reuse.

Exposure Controls / Personal Protective Equipment of E470a Calcium Stearate:

Engineering controls:
Provide adequate general and local exhaust ventilation at bag opening, mixing, blending, and packaging stations.
Maintain airborne dust concentrations as low as reasonably achievable; observe applicable limits for inhalable and respirable dust.

Eye protection:
Wear safety glasses with side protection; use sealed safety goggles where heavy dust is present.

Hand protection:
Wear suitable work gloves during industrial handling; food-contact-compliant gloves for food-grade applications.

Skin and body protection:
Wear suitable long-sleeved work clothing; remove contaminated clothing promptly.

Respiratory protection:
Wear a certified particulate respirator (P2/N95 or equivalent) where engineering controls cannot adequately control dust.

Hygiene measures:
Wash hands thoroughly after handling E470a Calcium Stearate and before eating, drinking, or smoking; do not eat or drink in industrial handling areas; keep contaminated workwear separate.

Identifiers of E470a Calcium Stearate:
CAS Number: 1592-23-0
EC Number: 216-472-8
ECHA InfoCard: 100.014.976
E Number: E470a (EU); INS 470(i) (Codex Alimentarius)
IUPAC Name: Calcium bis(octadecanoate); Calcium di(octadecanoate)
INCI Name: Calcium Stearate
Molecular Formula: C₃₆H₇₀CaO₄
Molecular Weight: 607.02 g/mol
InChIKey: CJZGTCYPCWQAJB-UHFFFAOYSA-L
SMILES: CCCCCCCCCCCCCCCCCC(=O)[O-].CCCCCCCCCCCCCCCCCC(=O)[O-].[Ca+2]
PubChem CID: 15324
ChEBI: CHEBI:190296
ChEMBL: ChEMBL2106092
ChemSpider: 14587
UNII: 776XM7047L
CompTox (EPA): DTXSID7027419
Beilstein/REAXYS: 3919698
MDL Number: MFCD00036390
COSING REF No: 32347 (cosmetics)
NCI Thesaurus: C45678
HS Code: 2915709000 / 38249993
EINECS: 216-472-8
GHS Signal Word: Warning (combustible dust)
GHS Hazard: Combustible dust (principal workplace hazard)
GHS: Not classified for major acute health hazards in standard commercial grades
US FDA: GRAS (21 CFR 184.1229, 172.863, 173.340, 175.300, 177.2410, 177.2600, 178.1010, 178.2010, 179.45, 181.29, 169.179)
JECFA ADI: Not specified (Meeting 29, 1985)
EU: Approved food additive E470a (Regulation EC 1333/2008)
REACH: Registered substance
Transport: Not classified as dangerous goods (ADR/RID, IMDG, IATA)
Pharmacopeial grades: USP/NF, BP, EP, FCC, JP17
Certifications available: Halal; Kosher; ISO; HACCP; FSSC 22000

Properties of E470a Calcium Stearate:
Physical state: Solid (powder, granule, or bead; emulsion form also available)
Appearance: White to yellowish-white (ivory, cream), fine, waxy, free-flowing powder
Odor: Practically odorless; slight characteristic fatty odor
Chemical formula: C₃₆H₇₀CaO₄
Molecular weight: 607.02 g/mol
Density: 1.08–1.12 g/cm³ (20°C)
Bulk density: ~200–300 g/L (grade-dependent)
Melting point: 150–160°C (grade-dependent; lit. 155°C ± 5°C)
Boiling point: 359.4°C at 760 mmHg
Flash point: 162.4°C
Decomposition temperature: ~435°C
Solubility in water: 0.004 g/100 mL at 15°C (practically insoluble)
Solubility in hot pyridine: Soluble
Solubility in hot alcohol/oils: Slightly soluble
Solubility in cold alcohol, ether, chloroform: Insoluble
XLogP3: ~12.51 (highly lipophilic)
Topological polar surface area: 80.3 Ų
Hydrogen bond donors: 0
Hydrogen bond acceptors: 4
Exact mass: 606.490 g/mol
Calcium content: 6.5–7.5% (standard grades)
Calcium oxide equivalent: 9.0–10.5%
Transport: Not classified as dangerous goods
GHS: Combustible dust (Warning); no standard acute health hazard classification

Specifications of E470a Calcium Stearate — Food/Pharma Grade:
CAS Number: 1592-23-0
EC Number: 216-472-8
E Number: E470a / INS 470(i)
Molecular Formula: C₃₆H₇₀CaO₄
Molecular Weight: 607.02 g/mol
Appearance: White to yellowish-white fine waxy powder
Calcium content (%): 6.5–7.5 (standard); 7.0 ± 0.5 (pharma)
Ash content (%): 9.0–10.5 (food/pharma)
Free fatty acid (as stearic acid) (%): ≤0.5 max
Loss on drying (%): ≤3.0 max (105°C, 3h)
Melting point (°C): 150–160 (155 ± 5 for pharma)
Fineness (200 mesh) (%): ≥99.0
Iodine number: ≤0.5
Heavy metals (as Pb) (%): ≤0.004 (≤40 ppm)
Lead (Pb) (mg/kg): ≤2
Arsenic (As) (mg/kg): ≤1–3
Chloride (Cl⁻) (mg/kg): ≤200
Sulfate (SO₄²⁻) (mg/kg): ≤1,000
Pharmacopeial standards: USP/NF; BP; EP; FCC; JP17
Packaging: 20–25 kg PE-lined kraft paper bags
Shelf life: 24–36 months in original sealed packaging
Storage: Cool (15–30°C), dry, well-ventilated; sealed; away from moisture and strong odors

Names of E470a Calcium Stearate:
E470a Calcium Stearate
Calcium Stearate
Calcium Distearate
Calcium Octadecanoate
Calcium Dioctadecanoate
Calcium Bis(stearate)
Calcium Bis(octadecanoate)
Stearic Acid Calcium Salt
Octadecanoic Acid Calcium Salt
Calcium Soap
Calcium Stearic Acid
E470a
E470
INS 470(i)
Calstar
Aquacal
Flexichem CS
Stavinor 30
Witco G 339S
Nopcote C 104
Arestab CA
Ceasit I
Darapel
Daiwax C
Synpro Stearate
Radiastar 1060
Baerlocher 5862
Parteck LUB-CST
Listab Ca
Nissan Calcium Stearate S
CAS 1592-23-0