National Toxicology Program

National Toxicology Program

Testing Status of Polysorbate 20 - M910077


CASRN: 9005-64-5

Formula: C26-H50-O10 (mixture)

Synonyms/Common Names

  • Polyoxyethylene sorbitan monolaurate
  • Tween 20

Known Uses

Emulsifier & dispersing agent for medicinal products, defoamer in foods

Chemical Properties

Toxicity Effects (HSDB)

Special Studies

  • C. elegans  (W91077)  Completed 
    • C. elegans

Organ Systems Toxicity

  • Conventional Teratology (Gavage)  (TER91010)  Completed 
    • Citation: Final Report on the Developmental Toxicity of Polyoxyethylene Sorbitan Monolaurate in Sprague-Dawley Rats
    • Rats: Sprague Dawley
    • Rats Maternal Negative 
    • Rats Fetal Negative 
NTP is located at the National Institute of Environmental Health Sciences, part of the National Institutes of Health.