What it is
This ingredient is a dimethyl ether of a mixed ethylene oxide and propylene oxide copolymer, giving a water-compatible liquid polyether. In formulations it helps retain moisture, acts as a co-solvent, and enhances the lightweight, smooth feel of emulsions. It is frequently seen in Japanese sunscreen milks where a fresh, non-tacky sensory profile is desired.
Safety & warnings
Polyether ingredients of this class are generally well tolerated with a low irritation profile and are not fragrance allergens. They are water-dispersible and not considered comedogenic.
Origin & sourcing
Synthetic; produced by copolymerizing ethylene oxide and propylene oxide and capping the ends as methyl ethers.
Questions everyone asks
What is the role of PEG/PPG-14/7 dimethyl ether in sunscreen?
It functions as a humectant and solvent, helping the formula hold moisture and feel light and smooth on application.
Is it oily on the skin?
No. It is a water-compatible polyether that contributes a fresh, non-greasy feel rather than an oily residue.