Ethoxydiglycol
Ethoxydiglycol (INCI: Ethoxydiglycol), also known as Diethylene Glycol Monoethyl Ether (DEGEE), is an odorless liquid with CAS# 111-90-0. It functions primarily as a solvent, humectant, and perfuming agent in cosmetic formulations. It is listed under Cosmetic Restriction III/297 and has been the subject of multiple SCCS safety opinions.
It acts as a superior solubilizer and efficacy booster for cosmetic actives such as Vitamin C, DHA (self-tanning), and benzoyl peroxide. In hair care, it supports longer-lasting and more uniform coloring and may help prevent split end formation according to manufacturer data.
Subject to cosmetic restriction (III/297) and multiple SCCS safety opinions (2006–2013), indicating regulatory scrutiny; users should be aware of concentration limits in finished products.
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