CAS 248-70-4 appears in our catalog under these names: Poly(9,9-di(2-ethylhexyl)-fluorenyl-2,7-diyl) end capped with N,N-bis(4-methylphenyl)aniline, Benzo(b)benzo(4,5)thieno(2,3–d)thiophene, Benzo[b]benzo[4,5]thieno[2,3-d]thiophene, >97.0%(GC), BTBT 97%, Benzo[b]benzo[4,5]thieno[2,3-d]thiophene, 97%, 97%. Offered by: Lumtec, GLPBio, TCI, Ambeed, Chemat. Available pack sizes: On request, 10g, 1g, 25g, 5g, 200mg, 100mg, 250mg.