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Pentylene Glycol
AKA “2-Pentanediol, 2-Dihydroxypentane, NSC-513, RefChem:860099, DTXCID80812123”
Synthetic
Ingredient Facts
Pentylene glycol
AKA: 2-Pentanediol, 2-Dihydroxypentane, NSC-513, RefChem:860099, DTXCID80812123
Synthetic · Skin Conditioning · EWG: 2
Varies With Manufacturer
Solvent
Skin Conditioner
Synthetic
Clean
A lightweight humectant that draws moisture into skin and helps dissolve other ingredients, keeping formulas smooth and skin hydrated.
Effective at 2.5%
Formula
C5H12O2
Mol. Weight
104.15
CAS #
5343-92-0
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks in moisture
Traditional Use
A synthetic humectant and preservative booster developed in the late 20th century. Created to improve hydration and product stability in modern skincare formulations.
Skin Types
●all-skin-types, gentle
Best For
Dehydration
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
2
CIR
Safe
Pregnancy
Yes
CIR Safety Findings
ewg-2
medical-approval
pregnancy-nursing-safe
all-shades-safe
Potential Sensitizer
Concentration Guide
0.005%
5.0%
0%7%
Effective Range
CIR reported use: 0.3-5 | 0.005-4
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
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Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR