Distearyl Thiodipropionate
AKA “Dioctadecyl 3, 3'-thiodipropionate, Dioctadecyl thiodipropionate, Plastanox STDP, Antioxidant STDP, Distearyl 3, Cyanox STDP”
Synthetic
Ingredient Facts
Distearyl thiodipropionate
AKA: Dioctadecyl 3, 3'-thiodipropionate, Dioctadecyl thiodipropionate, Plastanox STDP, Antioxidant STDP, Distearyl 3, Cyanox STDP
Synthetic · Antioxidant · EWG: 4
Plant-Derived
Antioxidant
Skin Conditioner
Plant Oil
Synthetic
Clean
A plant-derived antioxidant that helps protect your product from oxidizing and breaking down, keeping formulas fresh and effective longer.
Solubility Insoluble in water
Formula
C42H82O4S
Mol. Weight
683.20
CAS #
693-36-7
Form
Wax
See origin →
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Neutralizes Free Radicals
Traditional Use
A synthetic antioxidant developed in the 20th century for cosmetic preservation. Created to prevent oxidative degradation of cosmetic oils and fats, replacing traditional antioxidant methods.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR