PPG-6

AKA: Polypropylene Glycol, Polypropylene Glycol 6

Synthetic

Solvent

Skin Conditioner

Not Clean

PPG-6 is the polymer of propylene oxide

CAS #

57-55-6; 24800-44-0; 25322-69-4

Form

Liquid

Functions

Skin Conditioning

A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.

Solvent

Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.

Locks in moisture

Traditional Use

A polypropylene glycol polymer developed in the cosmetics industry during the 1960s-1970s. Used as a humectant to improve water retention and product consistency in skincare formulations.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR