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Humectant

POLYPROPANEDIOL-4

CAS 345260-48-2
88

Safety score · 0–100

Good

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

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

SURFACTANT - EMULSIFYINGEMULSION STABILISINGPLASTICISERSOLVENTSURFACTANT - CLEANSINGVISCOSITY CONTROLLING

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

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

Related humectants

88
2,3-BUTANEDIOL
Humectant
 88
ANHYDROXYLITOL
Humectant
 88
CALCIUM POLYGAMMA-GLUTAMATE
Humectant
 88
DIGLYCERIN
Humectant
 88
ERYTHRITOL
Humectant
 88
FRUCTOSE
Humectant
 88
GLYCERIN/PROPANEDIOL COPOLYMER
Humectant
 88
HYALURONIC ACID/PEG-800 CROSSPOLYMER
Humectant

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.