CAS 4430-25-5 appears in our catalog under these names: Tetrabromophenol Blue, >95% (HPLC), 4,5,6,7–Tetrabromo–3,3–bis(3,5–dibromo–4–hydroxyphenyl)–3H–benzo(c)(1,2)oxathiole 1,1–dioxide, Tetrabromophenol Blue , Tetrabromophenol blue, Tetrabromophenol Blue, pure. Offered by: TRC, GLPBio, Thermo Scientific (Alfa Aesar), Biosynth, Thermo Scientific (Acros). Available pack sizes: 100mg, 10mg, 50mg, 1g, 5g, 25g, 10g, 50g.