The Lab
Specimen No. 0141
ClearedSynthetichumectantsolvent

Butylene Glycol

butylene glycol · 1,3-butanediol · 1,3-butylene glycol

A petroleum-derived humectant and solvent approved by the CIR as safe at concentrations used in cosmetics. No evidence of reproductive toxicity, carcinogenicity, or cumulative toxicity. Can cause mild eye irritation at high concentrations.

medium confidence
Researched April 18, 2026

Concerns

  • Eye irritation at high concentrations
  • Rare allergic reactions in sensitive individuals
  • Petroleum-derived source

Commonly found in

MoisturizersSerumsTonersPrimersMakeup

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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