CAS 541-05-9 appears in our catalog under these names: Hexamethylcyclotrisiloxane, Hexamethylcyclotrisiloxane, >95% (GC), 2,2,4,4,6,6–Hexamethyl–1,3,5,2,4,6–trioxatrisilinane, Hexamethylcyclotrisiloxane, 97% , Hexamethylcyclotrisiloxane, >98.0%(GC). Offered by: Chemat Brand, TRC, Dr. Ehrenstorfer, GLPBio, Thermo Scientific (Alfa Aesar). Available pack sizes: on request, 250g, 25g, 5g, 250mg, 100g, 500g, 1000g.