Is Pentylene Glycol Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Pentylene Glycol is allowed in the EU but allowed in the US (humectant).
INCI name PENTYLENE GLYCOL. Also called Hydrolite-5. CAS 5343-92-0.
Other names: 1,2-Pentanediol, Hydrolite-5
Is Pentylene Glycol banned in the EU?
| EU status | Allowed |
|---|---|
| US status | Allowed |
| Risk level | low |
| Where it shows up | Drunk Elephant Protini Polypeptide Cream, Paula's Choice BOOST 10% Niacinamide Booster, Tatcha The Water Cream |
| CAS number | 5343-92-0 |
What is Pentylene Glycol?
Pentylene glycol (1,2-pentanediol) is a multifunctional cosmetic ingredient used as a humectant, solvent, and antimicrobial/preservative booster. It is increasingly used as a 'natural' alternative to traditional glycols and can be derived from sugarcane.
Why is Pentylene Glycol used in personal-care products?
Used to hydrate skin, enhance product stability, and boost the efficacy of traditional preservatives, often allowing reduction of their concentration. It has mild antimicrobial properties.
Is Pentylene Glycol dangerous? Documented risks
Pentylene glycol has a good safety and tolerability profile. It is less irritating than propylene glycol and is suitable for sensitive skin formulations. No carcinogenic or endocrine effects are identified. It is COSMOS/ECOCERT acceptable when bio-based. Minor irritation is possible at high concentrations in compromised skin.
Products that may contain Pentylene Glycol
How to avoid Pentylene Glycol: safer alternatives
Caprylyl glycol as a similar multifunctional preservative-humectant; glycerin for pure humectant function.
Frequently asked questions about Pentylene Glycol
Is pentylene glycol natural?
It can be derived from sugarcane (bio-based) and is accepted by some natural cosmetic certifiers. However, it requires chemical synthesis regardless of source.
Is pentylene glycol a preservative?
Not classified as a standalone preservative in the EU Cosmetics Regulation, but it has antimicrobial properties and is used to boost preservative systems, often reducing the need for traditional preservatives.
Scan any product's barcode and instantly see if it contains Pentylene Glycol or other ingredients banned overseas.
Scan a product free →Related humectant
Avoiding banned beauty ingredients? Check your food, too.
Sources
- EWG Skin Deep: Pentylene Glycol — Environmental Working Group
- CosIng: Pentylene Glycol Entry — European Commission CosIng
Our scores are never influenced by brands. Last updated 6/11/2026.