At a glance
- CAS number
- 5765-44-6
- INCI name
- Pentylene Glycol
- Function
- humectant, solvent, preservative booster, emollient
- Typical use level
- 1%–5%
- Solubility
- both
- Stable pH
- 3–8
CAS number and synonyms are sourced from PubChem. Function, usage levels, pH and compatibility are AI-assisted formulation guidance — verify against your supplier's technical data sheet and applicable regulations before use.
Also known as
1,2-Pentanediol 1,2-Pentylene Glycol Hydrolite-5 Pentanediol
Compatibility
Works well with:
Glycerin Niacinamide Hyaluronic Acid Phenoxyethanol Caprylyl Glycol Ethylhexylglycerin
Pentylene Glycol is highly compatible with most cosmetic ingredients and is frequently used as a co-preservative alongside phenoxyethanol, caprylyl glycol, or ethylhexylglycerin to enhance antimicrobial efficacy. It can improve the solubility of certain actives and boost the performance of preservative systems at relatively low concentrations. No significant incompatibilities are widely documented at typical use levels.
Formulation notes
Pentylene Glycol is a short-chain diol that functions primarily as a humectant, drawing moisture into the skin, and as a solvent for active ingredients and fragrances. It exhibits inherent antimicrobial properties, making it a popular preservative booster or partial preservative in 'free-from' formulations seeking to reduce traditional preservative loads. It is generally well tolerated by sensitive skin and is considered a milder alternative to propylene glycol.
Related ingredients
- Butylene GlycolHumectant
- Propylene GlycolHumectant
- PanthenolHumectant
- UreaHumectant
- Caprylic/Capric TriglycerideEmollient
- CyclopentasiloxaneEmollient