Tristearin
molecular structure · PubChem
AKA: 555-43-1, Glycerol tristearate, Glyceryl tristearate, Trioctadecanoin, TRISTEAROYLGLYCEROL, Stearic triglyceride, Spezialfett 118, Stearoyl triglyceride
Plant-Derived
Skin Conditioner
Plant Oil
Clean
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
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
Traditional Use
A naturally occurring triglyceride found in animal fats and some plant oils, historically used in tallow candles and soap-making. Modern cosmetic use as an emollient represents a refinement of traditional fat-based skincare ingredients.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR