Tween 20

SynonymsPolysorbate 20; PEG(20)sorbitan monolaurate, polyoxyethylenesorbitan monolaurate
CAS Number9005-64-5
Boiling point>100 °C
Brookfield Viscosity370-430 cps (25 °C, neat)
Refractive index1.46851
Specific gravity1.1
CMC value60 mg/l 
pH of 1% aqueous solution5-7
AppearanceClear, yellow to yellow-green viscous liquid
Molecular weight1,225 daltons
Chemical familyBelongs to the polysorbate family (A polyoxyethylene sorbitol ester)
Chemical natureSurfactant (detergent)
Detergent typeNonionic detergent
WaterMiscible in water (100 mg/mL), yielding a clear, yellow solution
Ethyl acetateMiscible
Liquid paraffinImmiscible
Fixed oilsImmiscible

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