The Index · Glycol humectant / solvent
Pentylene Glycol
Pentylene Glycol
C5 glycol humectant and solvent that also supports preservative systems.
FunctionalFunctional ingredient, not graded for skin benefits
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C5 glycol humectant and solvent that also supports preservative systems.
What it does
Improves skin feel and active solubility; frequent in serums and SPF bases.
The evidence
Functional ingredient (not graded for skin benefits): Well-used glycol; safety supported by CIR alkyl diol assessments. Credible chemical identity and cosmetic-use context come from CIR/SCCS/manufacturer INCI definitions and databases such as SpecialChem/PubChem[1].
How to use it
Expect this as a supporting INCI line item unless labeled as a featured active.
What it does in the formula
Functional ingredient — not graded for skin benefits
C5 glycol humectant and solvent that also supports preservative systems.[1]
Safety & limits
Source and region, always
all — Used in cosmetics within conventional leave-on/rinse-off levels; see cited safety literature.[1] CA US EU UK
Sources · 2
Numbered as cited in the text
- [1]Cosmetic Ingredient Review. Alkyl Diols. CIR (2018)regulator
- [2]SpecialChem. SpecialChem INCI profile: Pentylene Glycol. SpecialChem (2024)other
Revision history
18 Sept 2026Drafted by botTheSkindex Desk