Cetostearyl Alcohol

✦ Primary viscosity builder and emulsion thickener for creams, lotions, and conditioners.
✦ Conditions skin and hair by forming a soft, smooth film that reduces moisture loss.
✦ Stabilizes both oil-in-water and water-in-oil emulsions as an effective co-emulsifier.
✦ Suitable for skincare, haircare, body butters, solid bars, and stick deodorant formats.
✦ Derived from coconut or palm kernel oil — naturally sourced and vegan-friendly.
✦ Non-drying fatty alcohol that adds creaminess without dehydrating or irritating skin.
✦ Compatible with a wide range of emulsifiers, botanical oils, butters, and active ingredients.

Cetostearyl Alcohol, recognized in cosmetics by its INCI name Cetearyl Alcohol, is a mixture of two saturated fatty alcohols — cetyl alcohol at C16 and stearyl alcohol at C18. Derived from coconut oil or palm kernel oil through a reduction process, it has been a foundational structuring and conditioning ingredient in cosmetic manufacturing for decades, valued for its reliability and consistent performance across formulation types.

What makes cetostearyl alcohol distinctly valuable is its dual role as both an emollient and an emulsion stabilizer. It integrates into the oil phase of emulsions to build viscosity, prevent phase separation, and create a stable, creamy product texture. On skin, it forms a soft, occlusive layer that reduces transepidermal water loss without a heavy or greasy afterfeel. In hair care, it coats the cuticle to improve smoothness, shine, and detangling performance.

Rabibazaar supplies cosmetic-grade Cetostearyl Alcohol suitable for DIY formulators, soap makers, professional cosmetic manufacturers, and beauty entrepreneurs across Pakistan.

INCI Name : Cetearyl Alcohol
Chemical Name : Mixture of 1-Hexadecanol (Cetyl Alcohol) and 1-Octadecanol (Stearyl Alcohol)
CAS Number : 67762-27-0
Molecular Formula : Mixture — C16H34O and C18H38O
Appearance : White waxy flakes or pellets
Odor : Very faint, characteristic waxy odor
pH (1% solution) : Not Applicable — insoluble in water
Solubility : Insoluble in water; soluble in warm oils and ethanol when heated
Specific Gravity : 0.810 – 0.830 at 20°C
Flash Point : Above 185°C
HLB Value : Not Applicable — functions as co-emulsifier and stabilizer, not primary emulsifier
Recommended Use Level : 2% – 25% depending on application type
Type : Fatty alcohol; emollient, viscosity builder, emulsion stabilizer
Shelf Life : 2 years from manufacture when stored correctly

Skincare (Creams, Serums, Lotions) ★★★★★
An essential ingredient for building body and emulsion stability in moisturizers and creams. Use at 2–6% in lotions and up to 10% in richer cream formulations for optimal texture.

Haircare (Shampoo, Conditioner, Masks) ★★★★★
A staple in conditioner and hair mask formulations for its detangling and cuticle-smoothing properties. Use at 3–8% alongside a cationic emulsifier such as BTMS-50 for best results.

Soap Making (Cold Process, Melt and Pour) ★★★☆☆
Has limited role in traditional cold process soap but can be incorporated into melt and pour bases and specialty conditioning bars. Use at 2–5% in specialty bar formulations only.

Body Care (Scrubs, Butters, Balms) ★★★★☆
Excellent for structuring whipped body butters and balms to achieve a smooth, semi-solid consistency. Melt fully into the oil phase before blending with other butter bases.

Functional Cosmetics (Deodorants, Sunscreen, Baby Care) ★★★★☆
Valuable in stick deodorants, sunscreen emulsions, and gentle baby lotions as both a structuring and softening agent. Use at 5–20% in anhydrous stick formats to control firmness.

When I work with cetostearyl alcohol in emulsion-based formulas, I always add it to the heated oil phase and ensure it melts completely and uniformly before combining with the water phase. A poorly melted batch results in a gritty, lumpy emulsion that no amount of post-processing will correct. I also use it strategically to reduce reliance on synthetic thickeners like carbomer or hydroxyethylcellulose — replacing or partially substituting with cetostearyl alcohol gives a more natural-feeling, skin-responsive texture that customers tend to prefer.

ADVANCED TIP: In a conditioning solid hair bar, combine Cetostearyl Alcohol at 18% with BTMS-50 at 10% and Behentrimonium Chloride at 1.5%, then add Argan Oil at 5% and Panthenol at 2%. Process the full batch at 75–80°C until uniform, pour into molds at 65°C, and allow to cool slowly at room temperature without refrigeration. Rapid cooling causes uneven crystallization and surface cracking. This formula produces a firm conditioning bar that activates on wet hair with exceptional slip and defined cuticle-smoothing payoff.

Normal Skin : ★★★★★ — Works seamlessly to enhance moisture and texture without disrupting skin balance.
Dry Skin : ★★★★★ — Provides an emollient barrier that retains moisture and visibly softens rough, tight skin.
Oily Skin : ★★★☆☆ — Mild comedogenic potential at higher levels means use should be limited to 1–3% in lightweight formulas.
Combination : ★★★★☆ — Suitable when used in light emulsions with a low oil content targeting dry zones.
Sensitive Skin : ★★★★☆ — Generally well-tolerated with very low sensitization risk; patch testing remains advisable.
Mature Skin : ★★★★★ — Supports barrier repair and moisture retention, both critical priorities for aging skin.
Acne-Prone : ★★★☆☆ — Carries a mild comedogenic rating of 2 out of 5 — keep concentrations low in acne-targeted formulas.

CONCEPT 1: Classic Hydrating Body Lotion
Usage Level : 5%
Key Ingredients: Emulsifying Wax NF, Sweet Almond Oil, Glycerin, Distilled Water
Result : A lightweight, smooth-spreading body lotion with excellent skin feel and long-term emulsion stability.

CONCEPT 2: Intensive Repair Hair Conditioner
Usage Level : 6%
Key Ingredients: BTMS-50, Argan Oil, Panthenol, Hydrolyzed Keratin
Result : A rich, creamy rinse-out conditioner that detangles, reduces frizz, and restores softness to damaged hair.

CONCEPT 3: Whipped Solid Body Butter Bar
Usage Level : 18%
Key Ingredients: Shea Butter, Cocoa Butter, Fractionated Coconut Oil, Vitamin E
Result : A structured, palm-sized body butter bar that melts on contact with skin, leaving a non-greasy, deeply nourishing finish.

INCI Declared : Yes — must appear on finished product label as Cetearyl Alcohol
EU Cosmetics Reg : Permitted — no restrictions under Annex III, IV, or V; freely usable in cosmetic products
Rinse-Off Limit : No limit established — use within functional range
Leave-On Limit : No limit established — use within functional range
Allergen Alert : No — not classified as a contact allergen under EU Cosmetics Regulation
Skin Safety : Safe at recommended use levels; mild comedogenic potential exists at high concentrations
Eye Area Use : Use with caution — not an eye irritant but high concentrations in eye creams may produce grittiness
Ingestion : Not for internal use
Pregnancy Use : Generally considered safe for topical cosmetic use
Child Safety : Safe for use in baby and child formulations at standard cosmetic concentration levels
Ventilation : Not required — low volatility solid with no significant inhalation risk during normal handling
Storage : Store in a cool, dry place below 25°C away from direct heat and sunlight
Container : HDPE or glass preferred — avoid reactive metals

⚠️ Although cetostearyl alcohol has very low sensitization potential, individuals with a documented sensitivity to fatty alcohols may experience mild contact reactions. Always recommend patch testing in products intended for sensitive or reactive skin types.

Working pH Range : 4.0 – 9.0 — stable across the full functional cosmetic pH range
Heat Stability : Stable up to 200°C; melting point 49–56°C — must be processed in heated oil phase above 70°C
Freeze-Thaw Stable : Yes — does not separate or degrade through standard freeze-thaw cycling
Emulsion Type : Both — effective in O/W and W/O emulsions as co-emulsifier and stabilizer
Emulsification Phase: Hot — must be fully melted into oil phase before emulsification; cold addition not suitable
Compatible With : Emulsifying waxes, cationic emulsifiers (BTMS), fatty acids, plant oils, natural butters, silicones
Incompatible With : No significant incompatibilities identified; avoid prolonged contact with strong oxidizing agents
Oxidation Risk : Low — antioxidant addition not required, though Vitamin E at 0.1% is good practice for oil-phase protection
Discoloration Risk : None under normal processing conditions; slight yellowing possible if overheated above 200°C
Formulation Notes : Always melt cetostearyl alcohol completely in the heated oil phase at 70–75°C before adding to water phase. Incomplete melting produces a gritty emulsion texture that cannot be corrected after combining phases.

Q: Is cetostearyl alcohol the same as regular alcohol? Will it dry out my skin?
A: No. Cetostearyl Alcohol is a fatty alcohol, not a drying short-chain alcohol like ethanol or isopropyl alcohol. It is a waxy, moisturizing ingredient that conditions and softens skin rather than stripping or drying it.

Q: What is the difference between cetostearyl alcohol and emulsifying wax?
A: Emulsifying wax is a complete emulsifier capable of forming a stable emulsion on its own, while cetostearyl alcohol is primarily a co-emulsifier and thickener that works best alongside a primary emulsifier. They are frequently used together to improve texture, body, and emulsion stability.

Q: At what temperature should I add cetostearyl alcohol to my formulation?
A: Add cetostearyl alcohol to the oil phase and heat to 70–75°C until fully liquefied with no visible flakes remaining. Adding it to an insufficiently heated phase causes persistent grittiness in the finished product that cannot be corrected after emulsification.

Q: Can cetostearyl alcohol be used in natural and organic cosmetic formulations?
A: Yes, when sourced from coconut or certified sustainable palm kernel oil. It is accepted by many natural and organic cosmetic standards, but always verify the specific certification compliance and sourcing documentation with your supplier.

Q: How does cetostearyl alcohol compare to cetyl alcohol as a cosmetic thickener?
A: Cetyl alcohol, being a C16 single-chain fatty alcohol, produces a lighter, silkier skin feel with less thickening power. Cetostearyl alcohol, as a C16/C18 blend, delivers greater viscosity, a more substantial cream body, and superior emulsion stability. For rich creams and conditioners, cetostearyl alcohol is the preferred choice; for lighter serums and fluid emulsions, cetyl alcohol is often more appropriate.

Product evaluation

Review the specifications, supplied grade, intended use and compatibility of Cetostearyl Alcohol before ordering for production. Test a small quantity in the actual application and document the result before scaling.

Quality control

Inspect the received batch for expected appearance, odor, texture, packaging condition and labeling. Keep supplier and batch records, use accurate measurements, and retain a reference sample when the material is used commercially.

Storage and responsible use

Store tightly closed in a clean, cool and dry location away from direct sunlight. Follow the current supplier instructions and all safety, labeling and regulatory requirements that apply to the intended finished product.