CAS 9005-66-7 appears in our catalog under these names: Polysorbate 40 , Tween 40, Polyoxyethylene Sorbitan Monopalmitate, Tween 40 (=Polyoxyethylene Sorbitan Monopalmitate) [for Biochemical Research], Polysorbate 40. Offered by: Thermo Scientific (Alfa Aesar), Biosynth, TCI, Thermo Scientific (Acros), Chemat. Available pack sizes: 100ml, 500ml, 1kg, 0,5kg, 25g, 500g, 5g, 1l.