Specimen No. 0030
CautionSynthetichumectantsolvent
Propylene Glycol
propylene glycol · pg · 1,2-propanediol
Widely used humectant and solvent. At cosmetic concentrations it is generally safe, but is a known skin sensitizer in some people — particularly with leave-on products.
high confidence
Researched April 18, 2026Specimen 0030Propylene Glycol
Concerns
- Contact dermatitis in sensitive individuals (patch-test relevant)
- At high concentrations can irritate skin and mucous membranes
- GRAS (FDA) as food additive at normal levels
- Industrial-grade forms used in antifreeze — cosmetic grade is different
Commonly found in
MoisturizerSerumDeodorantShampooMakeup
Sources & references
Last researched: April 18, 2026
Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.
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