Isopentyldiol

Isopentyldiol 1
AKA: 3-Methyl-1, 3-butanediol, 3-methylbutane-1, 3-diol, 2568-33-4, 1, 3-Butanediol, Isoprene glycol, ISOPENTYL DIOL, 3-hydroxy-3-methylbutanol, 3-methyl-1, 3-butandiol
Synthetic
Humectant
Solvent
Clean
Isopentyldiol is a cosmetic ingredient. Also known as 3-Methyl-1. Rated low hazard by EWG.
Formula
C5H12O2
Mol. Weight
104.15
CAS #
50468-22-9, 2568-33-4
Functions
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Provides scent
Dissolves other ingredients
EWG
1
CIR
Insufficient
Pregnancy
—
CIR Safety Findings
all-shades-safe
Moderate Irritant
Regulatory Status
USAunder review
CANADA✔ permitted
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR