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Sorbeth-50 Tetraisostearate
AKA “Sorbitan Polysorbate Ester”
Synthetic
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Ingredient Facts
Sorbeth-50 tetraisostearate
AKA: Sorbitan Polysorbate Ester
Synthetic · Surfactant - Cleansing | Surfactant - Emulsifying · EWG: 4
Synthetic
Cleanser
Emulsifier
Synthetic
Clean
D-Glucitol, ethoxylated, tetraisooctadecanoate (50 mol EO average molar ratio Science: Origin: Botanic/Natural | Functions: Surfactant - Cleansing, Surfactant - Emulsifying Safety Ratings: CIR: Safe as used
Synthetic
Botanical. Derived from sorbitol (a glucose-derived polyol) and isostearic acid, a long-chain fatty acid. Synthesized through ethoxylation of sorbitol followed by esterification with isostearic acid molecules.
Function
Surfactant - Cleansing | Surfactant - Emulsifying
Benefits
Cleansing Surfactant
Emulsifier
Removes Impurities
Mixes Oil & Water
Traditional Use
Synthetic emulsifier developed in the mid-20th century as part of the polysorbate family. Created to provide stable emulsification in cosmetic formulations with high solubilizing power.
Skin Types
all-skin-types
Best For
Target
General
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
EWG Score4
CIR Safety Findings
medical-approval, all-shades-safe, Not a Sensitizer
Concentration Guide
Industry Max
Industry typically uses up to 0.9% in leave-on products (7 products reported). Source: CIR Safety Assessment (CIR Seq 696).
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Feb 2026
Data: CosIng · EWG · CIR