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Stearyl Alcohol Cosmetic Grade is a plant-derived fatty alcohol used as a stabilizer, thickener, and emollient in lotions, creams, and hair conditioners.
Unlike harsh rubbing alcohols, Stearyl Alcohol Cosmetic Grade is highly moisturizing, non-irritating, and improves product spreadability without clogging pores.
Stearyl Alcohol Cosmetic Grade is a long-chain primary fatty alcohol consisting of a hydroxy function at C-1 of an unbranched saturated chain of 18 carbon atoms.
CAS: 112-92-5
MF: C18H38O
MW: 270.49
EINECS: 204-017-6
Synonyms
Octadecanol, 1-;Octadecyl alcohol, Stearyl alcohol;1-Octadecanol,Octadecyl alcohol, Stearyl alcohol;Stearyl alcohol, synthesis grade;Stearyl alcohol, extra pure, Ph Eur, USP;Stearyl Alcohol (125 mg);n-OCTADECYL ALCOHOL, TECH;Ecorol 18/98: Stearyl Alcohol Pastilles
Stearyl Alcohol Cosmetic Grade has a role as a plant metabolite, a human metabolite and an algal metabolite.
Stearyl Alcohol Cosmetic Grade is a long-chain primary fatty alcohol, a fatty alcohol 18:0 and a primary alcohol.
Stearyl Alcohol Cosmetic Grade derives from a hydride of an octadecane.
Stearyl Alcohol Cosmetic Grade is a long-chain, saturated fatty alcohol. It’s the C18 “waxy” alcohol you’ll see in lots of creams and hair conditioners for slip and structure.
Stearyl Alcohol Cosmetic Grade is a thickener of cosmetic products, mainly creams and lotions.
A natural alcohol which is derived from Vegetable source, Stearyl alcohol changes the viscosity and adds a to creams and lotions, whilst adding stability
Mixed monolayers of Stearyl Alcohol Cosmetic Grade and ethylene glycol monooctadecyl ether were studied to investigate their evaporation suppressing performance.
The rate dependence of the collapse pressure for an octadecanolmonolayer using axisymmetric drop shape analysis has been investigated.
Stearyl Alcohol Cosmetic Grade Chemical Properties
Melting point: 56-59 °C (lit.)
Boiling point: 210 °C15 mm Hg
density: 0.812 g/mL at 25 °C (lit.)
bulk density: 300kg/m3
vapor density: 9.3 (vs air)
vapor pressure: <0.01 mm Hg ( 38 °C)
refractive index: 1.4356 (estimate)
Fp: 185°C
storage temp.: 2-8°C
solubility methanol: soluble10mg/mL, clear, colorless
form: Flakes
pka: 15.20±0.10(Predicted)
Specific Gravity: 0.812
color: White
Odor: wh. unctuous flakes or gran., faint odor, bland taste
explosive limit: ~8%
Water Solubility: insoluble
Merck: 14,8805
BRN: 1362907
Henry's Law Constant: 1.2×10-2 mol/(m3Pa) at 25℃, Duchowicz et al. (2020)
Dielectric constant: 3.4（58℃）
Cosmetics Ingredients Functions: SURFACTANT - CLEANSING
SURFACTANT - EMULSIFYING
FRAGRANCE
OPACIFYING
REFATTING
EMULSION STABILISING
SKIN CONDITIONING - EMOLLIENT
VISCOSITY CONTROLLING
SURFACTANT - FOAM BOOSTING
Cosmetic Ingredient Review (CIR): 1-Octadecanol (112-92-5)
InChI 1S/C18H38O/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h19H,2-18H2,1H3
InChIKey: GLDOVTGHNKAZLK-UHFFFAOYSA-N
LogP: 7.4
CAS DataBase Reference: 112-92-5(CAS DataBase Reference)
NIST Chemistry Reference: Stearyl Alcohol Cosmetic Grade(112-92-5)
EPA Substance Registry System: Stearyl Alcohol Cosmetic Grade (112-92-5)
Uses
Stearyl Alcohol Cosmetic Grade is used as a surfactant in cosmetics.
Stearyl Alcohol Cosmetic Grade effectively moisturizes hands and face with pheohydrane, which is a complex derived from the microalgae Chlorella Vulgaris and hydrolyzed algin found in sea water.
Stearyl Alcohol Cosmetic Grade is a saturated alcohol of high purity and can substitute for cetyl alcohol in pharmaceutical dispensing, in cosmetic creams, for emulsions, textile oils and finishes, as antifoam agent, lubricant, viscosity agent, builder, and chemical raw material.
Pharmaceutical Applications
Stearyl Alcohol Cosmetic Grade is used in cosmetics and topical pharmaceutical creams and ointments as a stiffening agent.
By increasing the viscosity of an emulsion, stearyl alcohol increases its stability.
Stearyl Alcohol Cosmetic Grade also has some emollient and weak emulsifying properties, and is used to increase the water-holding capacity of ointments, e.g. petrolatum.
In addition, Stearyl Alcohol Cosmetic Grade has been used in controlled-release tablets, suppositories, and microspheres.
Stearyl Alcohol Cosmetic Grade has also been investigated for use as a transdermal penetration enhancer.
Synthesis
Stearyl Alcohol Cosmetic Grade is synthesized from Stearic acid, which may be obtained by saponification of Tallow, or hydrogenation of Cottonseed oil, from Castor oil or from other natural oils.
