murphyIsoeicosane
AKA: 52845-07-5, ORISTAR IES, CREASIL IE, FANCOL IE, CREASIL IE CG, LIQUID ISOPARAFFIN, ISOEICOSANE [INCI]
Synthetic
Emollient
Solvent
Skin Conditioner
Clean
Hydrocarbons, C4, 1,3-butadiene-free, polym., pentaisobutylene fraction, hydrogenated
Formula
C20H42
Mol. Weight
282.50
CAS #
93685-79-1
Form
Liquid
Skin Types
●all-skin-types
Best For
General
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.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks In Moisture
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
CIR Safety Findings
Not Phototoxic
Human test found no phototoxicity in the CIR safety assessment (CIR 579)
Not a Skin Irritant
5 studies / 5 not irritating (CIR 579)
Not a Sensitizer
4 studies / 4 not sensitizing (CIR 579)
Mixed Eye Irritation Results
2 studies / 1 mixed / 1 not irritating / reactions slight (CIR 579)
Concentration Guide
Leave-on0.3–37%
Rinse-off5%
0%50%100%
CIR reported use · 2010 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR