Humectant
POLYPROPANEDIOL-4
Safety score · 0–100
Good
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A short-chain polymer of 1,3-propanediol — think of it as a heavier, less-sticky cousin of glycerin. Pulls water into skin, dissolves actives, leaves a clean light feel. Bio-derived grades dominate the market; safety profile is excellent.
Function
Skin benefits
- Humectant — draws moisture into skin
- Acts as a co-solvent for actives
- Light non-tacky skin-feel
Known concerns
- No significant concerns at cosmetic concentrations
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related humectants
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.