murphyC11-13 Isoparaffin
molecular structure · PubChem
AKA: Hydrocarbon, Mineral oil fraction
Synthetic
Solvent
Clean
OriginDerived from crude oil or natural gas through fractional distillation of petroleum hydrocarbons. Synthesized by catalytic hydrogenation and isomerization of paraffin fractions to create branched-chain alkanes.
Alkanes, C11-13-iso
CAS #
246538-78-3
Form
Liquid
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Dissolves Ingredients
Dissolves other ingredients
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not Phototoxic
Human test found no phototoxicity in the CIR safety assessment (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
2 studies / 2 not sensitizing (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
Leave-on0.3–27%
Rinse-offNot reported
0%50%100%
CIR reported use · 2010 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR