Butane
Propellant.
What it is
A gas obtained from natural gas and petroleum, kept liquid under pressure in spray cans.
A propellant that pushes the product out of an aerosol can.
What it does in a formula
PropellantOfficial EU function: Propellant
What official sources say
Restricted in certain uses · Cosmetics, EU
EU cosmetics law bans it only in some forms or uses (Annex II, entry 465).
Regulation (EC) No 1223/2009, Annex II: list of substances prohibited in cosmetic products (CosIng), retrieved 2026-10-09Worth knowing · The pure substance, EU
As a pure substance it has a physical hazard (for example flammable) (EU harmonised classification). How much a product contains matters.
Regulation (EC) No 1272/2008 (CLP), consolidated text, Annex VI Part 3 Table 3 (harmonised classifications), retrieved 2026-10-09