PRODUCTS

C18 STEARIC ACID

C18 Stearic Acid is commonly used in makeup, such as foundations and powders, for its ability to bind ingredients and improve the product’s spreadability on the skin.
C18 Stearic Acid provides a creamy, stable lather that helps razors glide smoothly while conditioning the skin.
C18 Stearic Acid acts as an emulsifier and thickener in creams, lotions, and soaps.

CAS Number: 57-11-4
EC / EINECS Number: 200-313-4
Molecular Formula: C₁₈H₃₆O₂
Molecular Weight: ~284.48 g/mol

SYNONYMS:
Octadecanoic acid, Other names, C18:0 (lipid numbers), stearic acid, Octadecanoic acid, 57-11-4, n-Octadecanoic acid, Stearophanic acid, Stearex Beads, Cetylacetic acid, 1-Heptadecanecarboxylic acid, Pearl stearic, Industrene R, Octadecansaeure, Stearinsaeure, Vanicol, Hydrofol Acid 150, Century 1240, Glycon DP, Glycon TP, Humko Industrene R, Formula 300, Hydrofol 1895, Hystrene 7018, Hystrene 9718, Glycon S-80, Glycon S-90, octadecoic acid, Tegostearic 254, Tegostearic 255, Tegostearic 272, Hystrene 80, Hydrofol acid 1655, Hydrofol acid 1855, Industrene 5016, Dar-chem 14, Emersol 120, Emersol 132, Hystrene 4516, Hystrene 5016, Groco 54, Groco 55, Groco 55L, Groco 58, Groco 59, Glycon S-70, Industrene 8718, Industrene 9018, Emersol 150, Kam 1000, Barolub FTA, FEMA No. 3035, Acidum stearinicul, HY-Phi 1199, HY-Phi 1205, HY-Phi 1303, HY-Phi 1401, Kam 2000, Kam 3000, C18:0, Century 1210, Stearic acid 50, Stearic acid, pure, PD 185, NAA 173, Emersol 153NF, Dervacid 3155, Purified stearic acid, Adeka sa 300, Edenor htict-n, Stearic acid 70, 4ELV7Z65AP, NSC-25956, Sterene 60b, Sterene 60r, Pristerene 4910, Pristerene 4916, Pristerene 4981, Pristerine 4989, Sterene 460, DTXSID8021642, Hyfac 410, Hyfac 420, Hyfac 421, Hyfac 422, Prifac 5905, NSC-261168, DTXCID301642, CHEBI:28842, 200-313-4, Batana, tooth powder, Himalayan Scrub, Papaya Enzyme, Body Scrub, Body Sprays, Doctor Plus, Body Gel, Obeo Baby Bubble, Jinhwagwangsu Hair, hydron;octadecanoate, Avocado Candy Scrub, Jinhwagwangsu Bubble, fatty acid 18:0, Turmeric Scrub Cream, RefChem:6691, Vaseline Moisturizing Cream, Hair Removal Cream For Men, Turmeric Mud Film Vitamin C, Intimate After Shave For Women, CELLBN FIRST CARE CLEANSER, ZENOL POWERFULX RECOVERYCREAM, 680-589-4, Stearate, Hystrene S-97, Hystrene T-70, Steric acid, Caswell No. 801D, Oktadekansaeure, acide stearique, acide octadecanoique, Hydrofol Acid 150 (VAN), MFCD00002752, CCRIS 2305, Prifac 2918, Lunac, HSDB 2000, Vis-Plus, EPA Pesticide Chemical Code 079082, Stearic Acid Cherry, Edenor C18, CH3-[CH2]16-COOH, Loxiol G 20, Century 1220, Century 1230, Emersol 6349, AI3-00909, Lunac S 20, Lunac S 40, Hydrofol Acid 1895, CHEMBL46403, NSC25956, Acidum stearicum 50, FA 18:0, NCGC00091596-02, Stearicacid, CAS-57-11-4, Isostearic acid EX, 18639-67-3, Haimaric MKH(R), Prisorine 3501, Prisorine 3502, Prisorine 3508, Emersol 871, Emersol 875, Emery 875D, Hystrene 9718NFFG, Emery 871, Unimac 5680, C-Lube 10, EINECS 200-313-4, Stearic acid [JAN:NF], NSC 25956, UNII-4ELV7Z65AP, BRN 0608585, Stearophanate, Promulsin, Stearex, Tsubaki, n-Octadecanoate, stearin acid, tearic acid, Bassinic acid, Lactaric acid, Talgic acid, octadecaonic acid, Stearic acid?, 1hmr, 1hmt, 4fnn, Kiri stearic acid, Stearic Acid(Food Addtive/Pharmaceutical Excipient/Cosmetic/Non-toxic plastic additives, Lunac YA, Stearic acid CRS, n-Octadecylic acid, Palmitostearic acid, Stearic acid, CP, 1-octadecanoic acid, EINECS 250-178-0, F 3 (lubricant), Industrene 4518, Nonsoul SK 1, Pristerene 4900, Pristerene 4904, Pristerene 4963, Pristerene 9429, Pristerene 9559, Hystrene S 97, Hystrene T 70, Edenor ST 1, Stearic acid (TN), Sunfat 18S, Emersol 153, Selosol 920, Industrene 5016K, Hystrene 9718NF, Kortacid 1895, Radiacid 0427, Edenor ST 20, Lunac 30, Serfax MT 90, Stearic acid_ravikumar, Unister NAA 180, Century 1224, Edenor HT-JG 60, Lunac S 90KC, Stearic acid (8CI), Stearic acid, puriss., Hystrene 7018 FG, Lunac S 30, Lunac S 50, Lunac S 90, Lunac S 98, 3v2p, 875D, 1-Heptadecanecarboxylate, Industrene 7018 FG, AFCO-Chem B 65, Heptadecanecarboxylic acid, Edenor C 18/98, Octadecanoic acid (9CI), Stearic acid, >=98%, SCHEMBL659, Hystrene 9718 NF FG, bmse000485, STEARIC ACID [II], STEARIC ACID [MI], EC 200-313-4, Emery 400 (Salt/Mix), STEARIC ACID [DSC], STEARIC ACID [JAN], Stearic acid (JP15/NF), Stearic acid (JP18/NF), Emersol 110 (Salt/Mix), STEARIC ACID [FHFI], STEARIC ACID [HSDB], SCHEMBL56011, Stearic acid (reagent grade), STEARIC ACID [VANDF], 4-02-00-01206 (Beilstein Handbook Reference), WLN: QV17, SCHEMBL249583, STEARIC ACID [MART.], STEARIC ACID [USP-RS], STEARIC ACID [WHO-DD], 17FA, GTPL3377, orb1304721, SCHEMBL3125045, SCHEMBL6047730, WO 2, CIS-9-OCTADECANOIC ACID, SCHEMBL10611257, UNII-X33R8U0062, MSK1716, Nonsoul SN 1 (Sodium salt), SNA-2000 (Sodium salt), Stearic acid, analytical standard, VLZ 200, HMS5085M19, PURIFIED STEARIC ACID [NF], Stearic acid, reagent grade, 95%, BB_NC-02187, HY-B2219, STEARIC ACID [EP MONOGRAPH], Tox21_111154, Tox21_201887, Tox21_300562, BBL012224, BDBM50240485, EBC-26446, LMFA01010018, s5733, SA 200, SBB060276, Stearic acid, >=95%, FCC, FG, STL163565, AKOS005716958, Tox21_111154_1, CCG-267314, DB03193, FA 1655, FS14761, X33R8U0062, NCGC00091596-01, NCGC00091596-03, NCGC00091596-04, NCGC00091596-05, NCGC00091596-07, NCGC00254456-01, NCGC00259436-01, BP-14047, E570, MSK1716-1000, ST023799, VS-03242, Stearic acid, puriss., >=98.5% (GC), Stearic acid, SAJ first grade, >=90.0%, CS-0021598, G 270, NS00010335, S 300, S0163, EN300-19730, Stearic acid, SAJ special grade, >=95.0%, Stearic acid, Vetec(TM) reagent grade, 94%, 400JB9103-88, A 1760, C01530, D00119, EC 250-178-0, F70008, SBI-0633521.0002, Stearic acid 50, tested according to Ph.Eur., F237888, Octadecanoic acid Solution in Hexane, 1000?g/mL, Q209685, SR-01000944717, Melting Point Standard 69-71C, analytical standard, SR-01000944717-1, Stearic acid, Grade I, >=98.5% (capillary GC), Stearic acid, SAJ first grade, >=90.0%, powder, F0001-1489, STEARIC ACID (CONSTITUENT OF SAW PALMETTO) [DSC], Stearic acid, certified reference material, TraceCERT(R), Z104474964, CD7993EA-AD14-452A-A907-33376CC98790, Stearic acid, European Pharmacopoeia (EP) Reference Standard, Stearic acid, United States Pharmacopeia (USP) Reference Standard, Stearic Acid, Pharmaceutical Secondary Standard; Certified Reference Material, InChI=1/C18H36O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20/h2-17H2,1H3,(H,19,20), Stearic acid, Octadecanoic acid, C18:0, 1-Heptadecanecarboxylic acid, Cetylacetic acid, NSC 25956, NSC 261168, Stearophanic acid, C18 saturated fatty acid, Saturated octadecanoic acid, Stearin (common triglyceride context)

C18 Stearic Acid is a long-chain saturated fatty acid containing eighteen carbon atoms and no double bonds, abbreviated as C18:0.
C18 Stearic Acid is also known by the IUPAC name octadecanoic acid.
In nature, C18 Stearic Acid does not usually exist in the free form but is found as part of triglycerides in fats and oils.

C18 Stearic Acid occurs widely in animal fats and some vegetable fats, most notably in cocoa butter and shea butter.
Commercially, C18 Stearic Acid is produced by hydrogenation of vegetable oils or by hydrolysis of animal fats, followed by purification.
Due to its long, saturated carbon chain, C18 Stearic Acid is a waxy solid at room temperature and relatively stable chemically.

C18 Stearic Acid is typically a white or off-white waxy solid at ambient temperature, often supplied as flakes, beads, or powder.
C18 Stearic Acid has a mild, fatty odor and floats on water due to its low density.
C18 Stearic Acid is a saturated fatty acid with an 18-carbon chain.

The IUPAC name is octadecanoic acid.
C18 Stearic Acid is a waxy solid and its chemical formula is C17H35CO2H.
C18 Stearic Acid's name comes from the Greek word στέαρ "stéar", which means tallow.

The salts and esters of C18 Stearic Acid are called stearates.
As its ester, C18 Stearic Acid is one of the most common saturated fatty acids found in nature following palmitic acid.
The triglyceride derived from three molecules of C18 Stearic Acid is called stearin.

C18 Stearic Acid is a saturated fatty acid derived from plant and animal sources, commonly used in skincare and cosmetic products.
C18 Stearic Acid acts as an emulsifier and thickening agent, helping to stabilize formulations and provide a creamy, smooth texture.
C18 Stearic Acid is often found in soaps, lotions, and cleansers, where it enhances lather and provides skin-conditioning benefits, making products feel richer and more hydrating.

C18 Stearic Acid (/ˈstɪərɪk/ STEER-ik, /stiˈærɪk/ stee-ARR-ik) is a saturated fatty acid with an 18-carbon chain.
The IUPAC name of C18 Stearic Acid is octadecanoic acid.
C18 Stearic Acid is a soft waxy solid with the formula CH3(CH2)16COOH.

The triglyceride derived from three molecules of C18 Stearic Acid is called stearin.
C18 Stearic Acid is a prevalent fatty acid in nature, found in many animal and vegetable fats, but is usually higher in animal fat than vegetable fat.

C18 Stearic Acid has a melting point of 69.4 °C (156.9 °F) °C and a pKa of 4.50.
C18 Stearic Acid's appearance melted is clear, colorless to pale yellow liquid.
C18 Stearic Acid's name comes from the Greek word στέαρ "stéar", which means tallow.

The salts and esters of C18 Stearic Acid are called stearates.
As its glycerol ester, C18 Stearic Acid is one of the most common saturated fatty acids found in nature and in the food supply, following palmitic acid.

Dietary sources of C18 Stearic Acid include meat, poultry, fish, eggs, dairy products, and foods prepared with fats; beef tallow, lard, butterfat, cocoa butter, and shea butter are rich fat sources of C18 Stearic Acid.
C18 Stearic Acid can be converted to zinc stearate, which is used as a lubricant for playing cards (fanning powder) to ensure a smooth motion when fanning.

C18 Stearic Acid is a common lubricant during injection molding and pressing of ceramic powders.
C18 Stearic Acid is a white solid with a mild odor.
C18 Stearic Acid floats on water.

C18 Stearic Acid is a C18 straight-chain saturated fatty acid component of many animal and vegetable lipids.
C18 Stearic Acid is a conjugate acid of an octadecanoate.
C18 Stearic Acid derives from a hydride of an octadecane.

C18 Stearic Acid (IUPAC systematic name: octadecanoic acid) is one of the useful types of saturated fatty acids that comes from many animal and vegetable fats and oils.
C18 Stearic Acid is a waxy solid.

C18 Stearic Acid is a metabolite found in or produced by Escherichia coli.
C18 Stearic Acid has been reported in Calodendrum capense, Amaranthus hybridus, and other organisms with data available.
C18 Stearic Acid is a saturated long-chain fatty acid with an 18-carbon backbone.

C18 Stearic Acid is found in various animal and plant fats, and is a major component of cocoa butter and shea butter.
C18 Stearic Acid, also called octadecanoic acid, is one of the useful types of saturated fatty acids that comes from many animal and vegetable fats and oils.

C18 Stearic Acid is a waxy solid, and its chemical formula is CH3(CH2)16COOH.
C18 Stearic Acid's name comes from the Greek word stear, which means tallow.
C18 Stearic Acid's IUPAC name is octadecanoic acid.

C18 Stearic Acid is known as a long-chain fatty acid that is saturated and has a yellow-white waxy appearance.
C18 Stearic Acid is also great for binding other ingredients together and preventing them from falling apart.
C18 Stearic Acid's chemical formula is C18H36O2.

Commercial C18 Stearic Acid is made by separation and hydrogenation of fats and is usually a mixture of C18 Stearic Acid (C-18) and palmitic acid (C-16).
C18 Stearic Acid is solid at room temperature, has a fatty character and is one of the most common saturated fatty acids found in nature.

C18 Stearic Acid is present in high-fat sources from both plants and animals, and it belongs to the category of saturated fatty acids.
Renowned for its positive health effects, C18 Stearic Acid appears as a waxy white solid with a molar mass of 284.48 g/mol and a chemical formula of CH3(CH2)16CO2H.

Naturally occurring in these fats are stearic, palmitic, and oleic acids, with the production of commercial C18 Stearic Acid requiring nearly equal amounts of oleic and palmitic acids.
C18 Stearic Acid is commonly found in nature either as an ester of fatty alcohol or as a mixed triglyceride with other long-chain acids.

Notably, animal fats often contain a higher concentration of C18 Stearic Acid compared to fats derived from plants.
C18 Stearic Acid is white crystalline block or white to milky white powder without obvious mechanical impurities.
C18 Stearic Acid is insoluble in water, slightly soluble in ethanol.

C18 Stearic Acid is a saturated long-chain fatty acid (C18) derived from natural fats and oils.
Known for its waxy, solid form and emulsifying properties, C18 Stearic Acid is widely used in rubber vulcanization, cosmetic formulations, plastic stabilizers, lubricants, detergents, and candle manufacturing.

USES and APPLICATIONS of C18 STEARIC ACID:
Soaps and Cleansers: C18 Stearic Acid is used to create a rich lather, improve texture, and add a creamy consistency to bar soaps and liquid cleansers.
Lotions and Creams: C18 Stearic Acid acts as a thickening agent and stabilizer, giving products a smooth, luxurious feel and helping them retain a consistent texture.

Cosmetic Products: C18 Stearic Acid is commonly used in makeup, such as foundations and powders, for its ability to bind ingredients and improve the product’s spreadability on the skin.
Shaving Creams: C18 Stearic Acid provides a creamy, stable lather that helps razors glide smoothly while conditioning the skin.

Candles: C18 Stearic Acid is often used to harden wax in candle-making, creating candles that hold their shape and burn evenly.
As food additive: C18 Stearic Acid (E number E570) is found in some foods.
In general, the applications of C18 Stearic Acid exploit its bifunctional character, with a polar head group that can be attached to metal cations and a nonpolar chain that confers solubility in organic solvents.

The combination leads to uses as a surfactant and softening agent.
C18 Stearic Acid undergoes the typical reactions of saturated carboxylic acids, a notable one being reduction to stearyl alcohol, and esterification with a range of alcohols.

This is used in a large range of manufactures, from simple to complex electronic devices.
Cosmetics & Personal Care: C18 Stearic Acid acts as an emulsifier and thickener in creams, lotions, and soaps.
Rubber Processing: Vulcanization activator for natural and synthetic rubber.

Candle Manufacturing: C18 Stearic Acid enhances burning stability and texture.
Plastics & PVC Stabilizers: C18 Stearic Acid acts as a lubricant and heat stabilizer.
Soaps & Detergents: C18 Stearic Acid is used as a hardening agent and surfactant precursor.

C18 Stearic Acid can be used as heat stabilizer and lubricant in the plastic industry.
C18 Stearic Acid can be used as a vulcanization activator, softener, dispersant in the rubber industry.
In textile industry, C18 Stearic Acid can be used as dispersant, softener, water repellant, penetrant, anti-friction agent, defoamer, etc.

C18 Stearic Acid can be used as an emulsifier, softener, gloss agent, etc. in the cosmetic industry.
In the food industry, C18 Stearic Acid can be used as emulsifier, dispersant, quality improver, etc.
C18 Stearic Acid can be used as sizing agent, softener, etc. in the papermaking industry.

C18 Stearic Acid can also be used as a brightener for metal polishing.
C18 Stearic Acid can also be used as a raw material for the production of candles, calcium carbonate and grease.
Applications of C18 Stearic Acid: Release Aid and Additive for Adhesives

Food and Beverage: C18 Stearic Acid is used as a Mold Release for Hard/Pressed Candies
Lubricants and Greases use of C18 Stearic Acid: Mold Release Lubricant for Sintering, Pressing Ceramic Powders, and Latex Foam; Thickener in Greases

Metal Working Fluids: C18 Stearic Acid is used in Metal Polishes and Buffing Compounds as a Binder
Oil and Gas: Viscosity Modifier for Oil Extraction
Personal Care: C18 Stearic Acid acts as an Emulsifier/Emulsion Stabilizer, Thickener, and Surfactant in Creams, Lotions, Detergents, Soaps,

Shaving Cream, Body Washes and Hair Care Products.
Functions as a Hardener in Candles, Soaps, Crayons and Pastels.
Plastics: C18 Stearic Acid is used Internal and External Lubricant and Viscosity Depressant in PVC Processing

Renewable Chemistries: Made from Palm Oil and Sourced from RSPO Members, our C18 Stearic Acid is Your Renewable Choice
Rubber: Activator, Accelerator, Internal Lubricant, Mold Release Agent and Surface Lubricant in Rubber Processing
Soaps and Detergents: The Primary Use of C18 Stearic Acid is in the Manufacture of Soaps, Detergents and Shampoos, Where it can be C18 Stearic Acid is used as the Base, or a Surfactant, Emulsifier, Emulsion Stabilizer, Thickener or in the Case of Bar Soaps, a Hardener

Surfactants and Esters: C18 Stearic Acid Functions as a Surfactant as Noted in Many of its Applications
Textiles: C18 Stearic Acid is used to Strengthen Yarn.
C18 Stearic Acid Combined with Castor Oil is Used to Make Softeners for Textile Sizing

Waxes: C18 Stearic Acid is used Binder and Thickener in Buffing Compounds
The most common uses for C18 Stearic Acid include being used for the production of soaps, emulsifiers, lubricants, carriers, and soap surfactants.

C18 Stearic Acid is used in a multitude of products that we use every day like shaving cream, cosmetics, medicines, skincare products, soaps, detergents and candles.
C18 Stearic Acid is also used in the manufacturing process of many more products, because this renewable fatty acid is extremely versatile.

C18 Stearic Acid is an emollient, emulsifier, and lubricant that helps in softening the skin and making it more moisturized.
C18 Stearic Acid is used in skincare and cosmetic products because of its numerous properties and benefits.
As well as in the diet, C18 Stearic Acid is used in hardening soaps, softening plastics and in making cosmetics, candles and plastics.

C18 Stearic Acid has a role as a plant metabolite, a human metabolite, a Daphnia magna metabolite and an algal metabolite.
C18 Stearic Acid is a long-chain fatty acid, a straight-chain saturated fatty acid and a saturated fatty acid.
C18 Stearic Acid is used as a negative plate additive in the manufacture of lead-acid batteries.

C18 Stearic Acid is added at the rate of 0.6 g per kg of the oxide while preparing the paste.
It is believed to enhance the hydrophobicity of the negative plate, particularly during dry-charging process.
C18 Stearic Acid also reduces the extension of oxidation of the freshly formed lead (negative active material) when the plates are kept for drying in the open atmosphere after the process of tank formation.

As a consequence, the charging time of a dry uncharged battery during initial filling and charging (IFC) is comparatively lower, as compared to a battery assembled with plates which do not contain C18 Stearic Acid additive.
Fatty acids are classic components of candle-making.

C18 Stearic Acid is used along with simple sugar or corn syrup as a hardener in candies.
C18 Stearic Acid is used in the manufacturing of candles, surfactants and fatty alcohols.

Furthermore, C18 Stearic Acid finds various applications in the rubber, lubricant and textile industry as well as in the production of EBS waxes, fatty amines and paper chemicals.
For a long time already, Baerlocher is using C18 Stearic Acid to produce metal soaps and additives for the plastics industry.

-Niche uses of C18 Stearic Acid:
Being inexpensive, nontoxic, and fairly inert, C18 Stearic Acid finds many niche applications.
Varied examples of C18 Stearic Acid use in manufacturing include soaps and greases, household soap products, synthetic rubber, cosmetic and pharmaceutical creams and lotions, candles, phonograph records, lubricants, shoe and metal polishes, food packaging, and rubber compounds.

-Soaps, cosmetics, detergents use of C18 Stearic Acid:
C18 Stearic Acid is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products.
Soaps are not made directly from C18 Stearic Acid, but indirectly by saponification of triglycerides consisting of C18 Stearic Acid esters.

Esters of C18 Stearic Acid with ethylene glycol (glycol stearate and glycol distearate) are used to produce a pearly effect in shampoos, soaps, and other cosmetic products.
They are added to C18 Stearic Acid in molten form and allowed to crystallize under controlled conditions.
Detergents are obtained from amides and quaternary alkylammonium derivatives of C18 Stearic Acid.

-Lubricants, softening and release agents use of C18 Stearic Acid:
In view of the soft texture of the sodium salt, which is the main component of soap, other salts are also useful for their lubricating properties.

Lithium stearate is an important component of grease.
The stearate salts of zinc, calcium, cadmium, and lead are used to soften PVC.
C18 Stearic Acid is used along with castor oil for preparing softeners in textile sizing.

They are heated and mixed with caustic potash or caustic soda.
Related salts are also commonly used as release agents, e.g. in the production of automobile tires.

As an example, it can be used to make castings from a plaster piece mold or waste mold, and to make a mold from a shellacked clay original.
In this use, powdered C18 Stearic Acid is mixed in water and the suspension is brushed onto the surface to be parted after casting.

This reacts with the calcium in the plaster to form a thin layer of calcium stearate, which functions as a release agent.
When reacted with zinc, C18 Stearic Acid forms zinc stearate, which is used as a lubricant for playing cards (fanning powder) to ensure a smooth motion when fanning.

C18 Stearic Acid is a common lubricant during injection molding and pressing of ceramic powders.
C18 Stearic Acid is also used as a mold release for foam latex that is baked in stone molds.

-Niche uses of C18 Stearic Acid:
Being inexpensive, nontoxic, and fairly inert, C18 Stearic Acid finds many niche applications.
C18 Stearic Acid is used as a negative plate additive in the manufacture of lead-acid batteries.

-Food uses of C18 Stearic Acid:
Of the saturated fatty acids consumed in the United States, C18 Stearic Acid consumption is second (26% of total saturated fatty acid intake) to palmitic acid (56% of total saturated fatty acid intake).

C18 Stearic Acid is more abundant in animal fat (up to 33% in beef liver) than in vegetable fat (typically less than 5%).
The important exceptions are the foods cocoa butter (34%) and shea butter, where the C18 Stearic Acid content (as a triglyceride) is 28–45%.

Examples of the use of C18 Stearic Acid in food manufacturing include baked goods, frozen dairy products, gelatins, puddings, hard candy, and nonalcoholic beverages.
C18 Stearic Acid (E number E570) is found in some foods.

-Soaps and cosmetics use of C18 Stearic Acid:
C18 Stearic Acid is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products.
Stearate soap, such as sodium stearate, could be made from C18 Stearic Acid but instead are usually produced by saponification of C18 Stearic Acid-containing triglycerides.
Esters of C18 Stearic Acid with ethylene glycol (glycol stearate and glycol distearate) are used to produce a pearly effect in shampoos, soaps, and other cosmetic products.

The stearate salts of zinc, calcium, cadmium, and lead are used as heat stabilizers for PVC.
C18 Stearic Acid is used along with castor oil for preparing softeners in textile sizing.
They are heated and mixed with caustic potash or caustic soda.

Related salts are also commonly used as release agents, e.g. in the production of automobile tires.
As an example, C18 Stearic Acid can be used to make castings from a plaster piece mold or waste mold, and to make a mold from a shellacked clay original.

In this use, powdered C18 Stearic Acid is mixed in water and the suspension is brushed onto the surface to be parted after casting.
This reacts with the calcium in the plaster to form a thin layer of calcium stearate, which functions as a release agent.

USES AND OCCURRENCE of C18 STEARIC ACID:
In general, the applications of C18 Stearic Acid exploit its bifunctional character, with a polar head group that can be attached to metal cations and a nonpolar chain that confers solubility in organic solvents.
The combination leads to uses as a surfactant and softening agent.
C18 Stearic Acid undergoes the typical reactions of saturated carboxylic acids, a notable one being reduction to stearyl alcohol, and esterification with a range of alcohols.
This is used in a large range of manufactures, from simple to complex electronic devices.

WHAT IS C18 STEARIC ACID USED FOR?
C18 Stearic Acid is used to thicken the products and bind the ingredients together.
C18 Stearic Acid has moisturizing and anti-inflammatory properties that make this ingredient a very popular choice in cosmetic and skincare products.

Skin care:
C18 Stearic Acid helps keep the skin soft and moisturized.
C18 Stearic Acid also binds the ingredients and keeps them from separating.
C18 Stearic Acid can be found in a range of skincare and personal care products like moisturizers, sunscreens, baby lotions, etc.

Hair care:
C18 Stearic Acid is a great emulsifying agent and a good conditioner for the hair.
C18 Stearic Acid coats the hair well, acting as a barrier against the harmful elements in the environment.
Moreover, C18 Stearic Acid is a light ingredient and does not weigh the hair down.

Cosmetic products:
C18 Stearic Acid is known to improve the texture of the products and help them spread more evenly.
C18 Stearic Acid acts as a great skin barrier and protects the skin while keeping the moisture locked in.

ORIGIN of C18 STEARIC ACID:
C18 Stearic Acid is obtained by the hydrolysis of common vegetable and animal oils and fats.
The resulting fatty acids then undergo crystallization or distillation.
There are certain pressing methods that are used to separate the solid saturated fatty acids from the liquid unsaturated fatty acids.
Cosmetic-grade C18 Stearic Acids are generally pressed two or three times to obtain different concentrations.

WHAT DOES C18 STEARIC ACID DO IN A FORMULATION?
*EMOLLIENT
*EMULSIFYING
*EMULSION STABILISING
*HAIR CONDITIONING

SAFETY PROFILE of C18 STEARIC ACID:
C18 Stearic Acid is a halal ingredient and safe for skin and hair when used in limited quantities.
C18 Stearic Acid is accepted by all skin types.
However, a patch test is recommended prior to usage.

ALTERNATIVES of C18 STEARIC ACID:
*CETYL ALCOHOL
*CETEARYL ALCOHOL

MANUFACTURING PROCESS of C18 STEARIC ACID:
Fatty acids play a crucial role in C18 Stearic Acid production, and the method depends on final product quality and raw material.
Various protocols are used.
Tallow and grease are common raw materials.
The production involves two main steps:

a. Hydrolysis generates glycerin and fatty acids from raw ingredients (oil or fat), followed by the separation of the two products.

b. Separation includes the purification and separation of the fatty acid mixture in the second stage.

TYPICAL PROPERTIES of C18 STEARIC ACID:
C18 Stearic Acid, with the chemical formula C18H36O2, is a saturated fatty acid commonly found in animal and plant fats.
C18 Stearic Acid is insoluble in water but dissolves in organic solvents such as acetone, chloroform, and alcohols, and is a weak acid with a slightly acidic pH when dissolved in oil or alcohol.

While stable, C18 Stearic Acid can undergo oxidation over time, forming hydroperoxides and other degradation products when exposed to air or light.
Functionally, C18 Stearic Acid serves as an emulsifying agent in cosmetics and personal care products, a thickening agent in creams and lotions, and a surfactant in soaps to enhance lather.

Additionally, C18 Stearic Acid acts as a lubricant in plastics, rubber, and metalworking industries, is a key ingredient in soap and detergent production through the formation of soap salts with alkalies, and is used as a plasticizer to improve the texture and flexibility of materials in the plastic industry.

METABOLISM of C18 STEARIC ACID:
An isotope labeling study in humans concluded that the fraction of dietary C18 Stearic Acid that oxidatively desaturates to oleic acid is 2.4 times higher than the fraction of palmitic acid analogously converted to palmitoleic acid.
Also, C18 Stearic Acid is less likely to be incorporated into cholesterol esters.

In epidemiologic and clinical studies, C18 Stearic Acid was found to be associated with lowered LDL cholesterol in comparison with other saturated fatty acids.
Examples: Salts, Potassium stearate, Calcium stearate, Cobaltous stearate, Lithium stearate, Magnesium stearate, Mercuric stearate, Sodium stearate, Zinc stearate, Esters, Estradiol stearate, Glycol stearate, Stearin, Testosterone stearate.

PRODUCTION of C18 STEARIC ACID:
In terms of its biosynthesis, C18 Stearic Acid is produced from palmitoyl-CoA, with malonyl-CoA a two-carbon building block (after decarboxylation).
C18 Stearic Acid is obtained from fats and oils by the saponification of the triglycerides using hot water (about 100 °C).
The resulting mixture is then distilled.
Commercial C18 Stearic Acid is often a mixture of stearic and palmitic acids, although purified C18 Stearic Acid is available.
Commercially, oleic acid, as found in palm and soy, can be hydrogenated to give C18 Stearic Acid.

PHYSICAL and CHEMICAL PROPERTIES of C18 STEARIC ACID:
Chemical formula: C18H36O2
Molar mass: 284.484 g·mol⁻¹
Appearance: White solid
Odor: Pungent, oily
Density: 0.9408 g/cm³ (20 °C)
Density: 0.847 g/cm³ (70 °C)
Melting point: 69.3 °C (156.7 °F; 342.4 K)
Boiling point: 361 °C (682 °F; 634 K), decomposes
Boiling point: 232 °C (450 °F; 505 K) at 15 mmHg

Solubility in water: 0.0018 g/100 g (0 °C)
Solubility in water: 0.0029 g/100 g (20 °C)
Solubility in water: 0.0034 g/100 g (30 °C)
Solubility in water: 0.0042 g/100 g (45 °C)
Solubility in water: 0.0050 g/100 g (60 °C)
Solubility: Soluble in alkyl acetates
Solubility: Soluble in alcohols
Solubility: Soluble in methyl formate

Solubility: Soluble in phenyls
Solubility: Soluble in carbon disulfide
Solubility: Soluble in carbon tetrachloride
Solubility in dichloromethane: 3.58 g/100 g (25 °C)
Solubility in dichloromethane: 8.85 g/100 g (30 °C)
Solubility in dichloromethane: 18.3 g/100 g (35 °C)

Solubility in hexane: 0.5 g/100 g (20 °C)
Solubility in hexane: 4.3 g/100 g (30 °C)
Solubility in hexane: 19 g/100 g (40 °C)
Solubility in hexane: 79.2 g/100 g (50 °C)
Solubility in hexane: 303 g/100 g (60 °C)
Solubility in ethanol: 1.09 g/100 mL (10 °C)
Solubility in ethanol: 2.25 g/100 g (20 °C)
Solubility in ethanol: 5.42 g/100 g (30 °C)

Solubility in ethanol: 22.7 g/100 g (40 °C)
Solubility in ethanol: 105 g/100 g (50 °C)
Solubility in ethanol: 400 g/100 g (60 °C)
Solubility in acetone: 4.73 g/100 g
Solubility in chloroform: 15.54 g/100 g
Solubility in toluene: 13.61 g/100 g

Vapor pressure: 0.01 kPa (158 °C)
Vapor pressure: 0.46 kPa (200 °C)
Vapor pressure: 16.9 kPa (300 °C)
Magnetic susceptibility (χ): −220.8 × 10⁻⁶ cm³/mol
Thermal conductivity: 0.173 W/m·K (70 °C)
Thermal conductivity: 0.166 W/m·K (100 °C)
Refractive index (nD): 1.4299 (80 °C)

Crystal structure: B-form = Monoclinic
Space group: B-form = P2₁/a
Point group: B-form = Cs (2h)
Lattice constant a: 5.591 Å
Lattice constant b: 7.404 Å
Lattice constant c: 49.38 Å (B-form)
Lattice constant α: 90°
Lattice constant β: 117.37°
Lattice constant γ: 90°

Heat capacity (C): 501.5 J/mol·K
Standard molar entropy (S°298): 435.6 J/mol·K
Standard enthalpy of formation (ΔfH°298): −947.7 kJ/mol
Standard enthalpy of combustion (ΔcH°298): −11342.4 kJ/mol
Molecular Weight: 284.5 g/mol
XLogP3: 7.4
Hydrogen Bond Donor Count: 1
Hydrogen Bond Acceptor Count: 2
Rotatable Bond Count: 16

Exact Mass: 284.271530387 Da
Monoisotopic Mass: 284.271530387 Da
Topological Polar Surface Area: 37.3 Å²
Heavy Atom Count: 20
Formal Charge: 0
Complexity: 202
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0

Undefined Atom Stereocenter Count: 0
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
Boiling Point: 361°C
Melting Point: 69.3°C
pH: 5.5

Solubility: Insoluble in water
Solubility: Soluble in oil
Viscosity: 7.79 cP
IUPAC Name: Octadecanoic acid
Common Name: Stearic acid
CAS Number: 57-11-4
EC / EINECS Number: 200-313-4
Molecular Formula: C₁₈H₃₆O₂
Molecular Weight: ~284.48 g/mol
PubChem CID: 5281

ChemSpider ID: 5091
SMILES: CCCCCCCCCCCCCCCCCC(=O)O (straight-chain carboxylic acid)
InChIKey: QIQXTHQIDYTFRH-UHFFFAOYSA-N
Melting point: ~68–70 °C — solidifies easily due to saturated structure.
Boiling point: ~361 °C (decomposes at high heat).
Density: ~0.94 g/cm³ at 20 °C.
Solubility: Practically insoluble in water; readily soluble in organic solvents such as ethanol, ether, chloroform and hot hydrocarbons.
Vapor pressure: Very low at ambient temperature.
Refractive index: ~1.4299 and above depending on temperature.
Physical state: Solid (waxy/flake).

FIRST AID MEASURES of C18 STEARIC ACID:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of C18 STEARIC ACID:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of C18 STEARIC ACID:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of C18 STEARIC ACID:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of C18 STEARIC ACID:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of C18 STEARIC ACID:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available