C15-35 Isoparaffin/Isoalkylcycloalkanes
molecular structure · PubChem
AKA: Mineral Oil
Synthetic
Skin Conditioner
Not Clean
C15-35 Isoparaffin/Isoalkylcycloalkanes is a petroleum fraction consisting chiefly of C15-35 branched chain hydrocarbons and branched chain cyclic hydrocarbons
CAS #
-
Form
Oil
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 synthetic hydrocarbon mixture developed as a mineral oil alternative in modern cosmetics. Created in the 20th century as an occlusive emollient and solvent.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Concentration Guide
100%
0%100%
Reg. Limit
FDA OTC limit: 100% (Skin Protectant). 50-100% standalone; 30-35% when combined with colloidal oatmeal Source: FDA OTC Monograph, 21 CFR 347.10.
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