Butane
AKA “n-Butane, Diethyl, Methylethylmethane, Butanen, Butani, Butyl hydride, HC 600, A 21 (lowing agent)”
Synthetic
Ingredient Facts
Butane
AKA: N-Butane, Diethyl, Methylethylmethane, Butanen, Butani, Butyl hydride, HC 600, A 21 (lowing agent)
Synthetic · Propellant · EWG: 7
Synthetic
Synthetic
Not Clean
Butane is a propellant gas that helps dispense the product from the aerosol container in a fine, even mist.
Solubility 61 mg/L at 68 °F (NTP, 1992)
Formula
C4H10
Mol. Weight
58.12
CAS #
106-97-8
Form
Liquid
State
Butane is a colorless gas with a faint petroleum-like odor. For transportation it may be stenched. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbit
See origin →
Functions
Propellant
Dispenses Product
Antioxidant Protection
Reduces Inflammation
Propels product from container
Traditional Use
A hydrocarbon gas first synthesized in the 19th century and adopted by the cosmetics industry in the mid-20th century as a propellant for aerosol sprays and foam products.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Final Report of the Safety Assessment of Isobutane, Isopentane, n-Butane, and Propane
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Dibutyl Phthalate, Dimethyl Phthalate, and Diethyl Phthalate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of PPG-9, -25, and -40 Diethylmonium Chloride
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Isobutane, Butane, Isopentane and Propane
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Re-evaluation: Dibutyl, Dimethyl and Diethyl Phthalate and Butyl Benzyl Phthalate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
1,2-Butanediol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
1,4-Butanediol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
2,3-Butanediol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Feb 2026 · 🧪 = conflict
Data: PubChem · CosIng · EWG · CIR