N-butane ●
TL;DR. This ingredient is primarily used as an aerosol propellant, helping dispense sprays, foams, and mousses from pressurized packaging. It can also act as a transient solvent that evaporates quickly after application.
What does N-butane do in a cosmetic formula?
This ingredient is primarily used as an aerosol propellant, helping dispense sprays, foams, and mousses from pressurized packaging. It can also act as a transient solvent that evaporates quickly after application.
Is N-butane clean?
From a clean-beauty perspective, it has friction because it is a fossil-derived VOC and a highly flammable pressurized gas. It is not a common skin sensitizer, but many clean frameworks restrict or exclude petrochemical aerosol propellants.
Is N-butane sustainable?
This material is typically sourced from petroleum or natural gas processing. It has low bioaccumulation concern, but its fossil origin and VOC release give it a weaker sustainability profile.
Is N-butane COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic because it is a fossil-derived aerosol propellant rather than an approved natural-origin material. Its Green Chemistry fit is limited by nonrenewable sourcing and direct atmospheric release, even though it is not considered environmentally persistent.
How does N-butane work chemically?
The molecule is a four-carbon saturated hydrocarbon gas that is stored as a liquefied propellant under pressure and rapidly evaporates at room temperature. In aerosol products, propellant systems can range widely, often from about 5% to over 50% depending on spray format, can design, and desired foam or mist behavior.
Last updated 2026-05-15