OlfactionaryPropylene glycol butyl ether
At a glance
Propylene glycol butyl ether is a synthetic glycol ether produced by reacting propylene oxide with n‑butanol; it is a clear, low‑odor solvent used in cosmetics and fragrance formulations as a carrier.
Why synthetics aren't a downgrade, a different toolkit → · Why some materials get IFRA-restricted →