Stearyl Alcohol

STEER-ul AL-kuh-hol

Conditioning Agent, Emollient, Emulsifier, Thickener 9/10 Safety CG ApprovedClean Natural Vegan

What Is Stearyl Alcohol?

Stearyl Alcohol is a long-chain fatty alcohol with 18 carbon atoms, making it one of the heavier fatty alcohols used in hair care. Like cetyl and cetearyl alcohol, it is not a drying alcohol. It is derived from coconut or palm oil and provides emollient conditioning, emulsification, and thickening in hair care formulations.

Source: Coconut oil or palm oil (or synthetic)

Origin: Natural

Also known as: Octadecyl Alcohol, 1-Octadecanol, Octadecanol

What Does Stearyl Alcohol Do to Your Hair?

Stearyl Alcohol coats and softens the hair shaft, smoothing the cuticle and reducing friction for improved combability. It provides a slightly heavier conditioning feel compared to cetyl alcohol due to its longer carbon chain. It also serves as an emulsifier and thickener, helping to stabilize and add body to cream-based products.

Best For

Curly hair (3A-4C), dry hair, coarse hair, thick hair, damaged hair

Not Recommended For

Very fine hair (may be too heavy), oily hair

Concentration Matters

1-10%

Hair Type Compatibility

1A Straight Fine
1B Straight Medium
1C Straight Coarse
2A Wavy Fine
2B Wavy Medium
2C Wavy Coarse
3A Curly Loose
3B Curly Tight
3C Curly Corkscrew
4A Coily S-Shaped
4B Coily Z-Shaped
4C Coily Tight
Heat-damaged: Beneficial

Method Compatibility

Curly Girl (CG) Method: Approved
CG Approved
LCO Method
LOC Method

Safety & Regulation

9/10
AvoidCautionSafe

Extremely safe. Non-toxic, non-irritating, and non-sensitizing. Identical safety profile to other long-chain fatty alcohols. Do not confuse with short-chain drying alcohols.

FDA Status: Generally Recognized As Safe

FDA permits use in cosmetics and food products. CIR panel considers safe at current use concentrations.

EWG Score: 1/10

HairAide Verdict

Stearyl Alcohol is a safe, effective conditioning fatty alcohol that provides rich moisture and smoothing. It is slightly heavier than cetyl alcohol, making it an excellent choice for thick, coarse, and very curly hair types that crave extra conditioning. Fine-haired individuals may want to opt for cetyl alcohol-based products instead.

Products That Contain Stearyl Alcohol

Conditioners, hair masks, styling creams, curl creams, leave-in conditioners

Alternatives to Stearyl Alcohol

If you want to avoid Stearyl Alcohol, look for products with these ingredients instead:

Cetyl Alcohol, Cetearyl Alcohol, Behenyl Alcohol

Frequently Asked Questions

Is Stearyl Alcohol safe for hair?

Yes, Stearyl Alcohol has a safety rating of 9/10 and is generally considered safe for use in hair products. Extremely safe. Non-toxic, non-irritating, and non-sensitizing. Identical safety profile to other long-chain fatty alcohols. Do not confuse with short-chain drying alcohols.

Is Stearyl Alcohol bad for curly hair?

Stearyl Alcohol is CG-method approved and is generally considered safe for curly hair.

Is Stearyl Alcohol CG-method approved?

Yes, Stearyl Alcohol is approved for the Curly Girl method.

What can I use instead of Stearyl Alcohol?

Some alternatives to Stearyl Alcohol include: Cetyl Alcohol, Cetearyl Alcohol, Behenyl Alcohol

Get Our Free Ingredient Decoder Cheat Sheet

Take the guesswork out of reading product labels. Our printable cheat sheet helps you decode ingredients while you shop.

Check What's In Your Products

Use our free Hair Product Label Analyzer to check any product's ingredient list instantly.

Analyze My Product →