murphyTristearin
AKA: 555-43-1, Glycerol tristearate, Glyceryl tristearate, Trioctadecanoin, TRISTEAROYLGLYCEROL, Stearic triglyceride, Spezialfett 118, Stearoyl triglyceride
Plant-Derived
Skin Conditioner
Clean
OriginTypically derived from coconut, palm kernel, or soybean oils containing stearic acid. Produced through catalytic hydrogenation of natural plant oils to create the saturated triglyceride.
Tristearoylglycerol is a triglyceride that is glycerol in which all three hydroxy groups have been formally esterified with stearic acid. It has a role as a plant metabolite and a Caenorhabditis elegans metabolite. It is functionally related to an octadecanoic acid.
Solubility Insoluble in water. Soluble in chloroform, carbon disulfide
Formula
C57H110O6
Mol. Weight
891.50
CAS #
555-43-1
Form
Powder
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.
Viscosity Controlling
Locks in moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️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 an Eye Irritant
2 studies / 2 not irritating (CIR 742)
Not a Skin Irritant
2 studies / 2 not irritating (CIR 316 and 742)
Not a Sensitizer
2 studies / 2 not sensitizing (CIR 742)
Concentration Guide
Leave-on0.004–24%
Rinse-offNot reported
0%50%100%
CIR reported use · 2015 survey
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR