Ethylhexyl C10-40 Isoalkyl Acidate

AKA: Ethylhexyl isododecanoate, Isoalkyl ester

Synthetic

Skin Conditioner

Acid

Not Clean

Ethylhexyl C10-40 Isoalkyl Acidate is the ester of C10-40 isoalkyl acid and 2-ethylhexyl alcohol

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.

Locks in moisture

Traditional Use

A modern synthetic ester developed for cosmetics. Functions as an emollient and conditioning agent in high-end skincare and makeup formulations.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

Skin Types

●all-skin-types

Best For

Dryness

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed1 review →

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

Verified Jun 2026

Data: CosIng · EWG · CIR