CAS 7087-21-0 appears in our catalog under these names: 3–Allyl–1,1,1,5,5,5–hexamethyl–3–((trimethylsilyl)oxy)trisiloxane, 3-Allyl-1,1,1,5,5,5-hexamethyl-3-((trimethylsilyl)oxy)trisiloxane 97%, 3-Allyl-1,1,1,5,5,5-hexamethyl-3-((trimethylsilyl)oxy)trisiloxane, 97%, 97%, Allyltris(trimethylsiloxy)silane, 97%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 25g, 5g, 250mg, 100mg, 10g.