C15-35 Isoparaffin/Isoalkylcycloalkanes
molecular structure · PubChem
AKA: Mineral Oil
Synthetic
Skin Conditioner
Not Clean
OriginDerived from crude petroleum fractions containing branched-chain hydrocarbons in the C15-35 carbon range. Produced through fractional distillation and hydroisomerization of petroleum feedstocks to yield branched cyclic alkanes.
C15-35 Isoparaffin/Isoalkylcycloalkanes is a petroleum fraction consisting chiefly of C15-35 branched chain hydrocarbons and branched chain cyclic hydrocarbons
CAS #
-
Form
Oil
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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
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.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not Phototoxic (CIR Panel on the ingredient group)
CIR Panel statement covering this group of ingredients; not tested individually (CIR 579)
Not Comedogenic (CIR Panel on the ingredient group)
CIR Panel statement covering this group of ingredients; not tested individually (CIR 579)
Not a Sensitizer (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 579)
Eye Irritant in Testing (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 579)
Skin Irritant in Testing (CIR report on the ingredient group)
CIR report statement covering this group of ingredients / not tested individually (CIR 579)
Concentration Guide
0%50%100%
Reg. limit 100%
CIR lists it as not reported to be in use.
CIR · 2010 survey
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
Verified Jun 2026
Data: CosIng · EWG · CIR
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