Octanediol

AKA: 1, 8-Octanediol, Octane-1, 8-diol, 8-Dihydroxyoctane, ORISTAR OTD, .OMEGA.-OCTANEDIOL

Synthetic

Not Clean

The Panel also concluded that the available data are insufficient to make a determination that ... Octanediol ... is safe under the intended conditions of usein cosmetic formulations.

Formula

C8H18O2

Mol. Weight

146.23

CAS #

629-41-4

Form

Liquid

Functions

Plasticiser

Strengthens Barrier

Antioxidant

Moisturizing

Adds flexibility

Traditional Use

Synthetic humectant and preservative booster developed in the mid-20th century. Used in cosmetics to improve hydration and enhance the efficacy of other preservatives.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

medical-approval

all-shades-safe

Moderate Irritant

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: PubChem · CosIng · EWG · CIR