Steareth-21
Brij 721
HLB：15.5
Cas No：9005-00-9
Surfactant,
Emulsifier
Steareth-21 is a surfactant composed of polyethylene glycol polymer and stearyl alcohol. https://www.ewg.org/skindeep/ingredient/724159/STEARETH-21/#.WzXrvBZlCEc