Surfactant Ammonium Laureth Sulfate CAS 32612-48-9 ALES 70% Lauryl glycol polyether has antifoam properties. Polyether defoamer is a major variety of defoamer at present, which has the advantages of non-toxic, tasteless, non-irritating, resistant to hard water and acid and alkali, and good compatibility with the system. Compared with another class of silicon-containing defoamer, although its defoamer performance is not high, its anti-foam performance is quite excellent.