Isododecane
eye-so-DOE-deh-kane
What Is Isododecane?
A volatile hydrocarbon solvent used as a lightweight carrier and spreading agent in hair products. It evaporates after application, leaving other ingredients deposited on the hair.
Source: Petroleum-derived hydrocarbon
Origin: Synthetic
Also known as: Isododecane, Permethyl 99A
What Does Isododecane Do to Your Hair?
Acts as a volatile carrier that helps spread other ingredients evenly on hair before evaporating cleanly. Provides a dry, silky initial feel. Used as a lighter alternative to cyclic silicones in some formulations.
Best For
All hair types, fine hair, styling products
Not Recommended For
Those avoiding petroleum-derived ingredients
Concentration Matters
5-30% in products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe for topical cosmetic use. Evaporates so no buildup concern. Petroleum-derived which some consumers prefer to avoid. No direct health concerns at cosmetic concentrations.
FDA Status: Generally Recognized As Safe
FDA permits use in cosmetics without restrictions.
EWG Score: 3/10
HairAide Verdict
A lightweight volatile solvent that evaporates cleanly. Good alternative to volatile silicones for those concerned about silicone environmental impact. Petroleum-derived, which is a trade-off.
Products That Contain Isododecane
Hair serums, heat protectants, styling products, anti-frizz treatments
Alternatives to Isododecane
If you want to avoid Isododecane, look for products with these ingredients instead:
Cyclopentasiloxane, lightweight silicones, Isohexadecane
Frequently Asked Questions
Yes, Isododecane has a safety rating of 7/10 and is generally considered safe for use in hair products. Safe for topical cosmetic use. Evaporates so no buildup concern. Petroleum-derived which some consumers prefer to avoid. No direct health concerns at cosmetic concentrations.
Isododecane is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Isododecane is not approved for the Curly Girl method.
Some alternatives to Isododecane include: Cyclopentasiloxane, lightweight silicones, Isohexadecane
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