CAS 21285-46-1 appears in our catalog under these names: (E)-2,3-Dibromobut-2-ene-1,4-diol, 97%, trans–2,3–Dibromo–2–butene–1,4–diol, trans-2,3-Dibromo-2-butene-1,4-diol, >99.0%(GC), 2-Butene-1,4-diol, 2,3-dibromo-, (2E)-, 98%, 98%, (E)-2,3-Dibromobut-2-ene-1,4-diol, 95%. Offered by: AmBeed, GLPBio, TCI, Chemat, Fluorochem. Available pack sizes: 25g, 100g, 500g, 50g, 75g, 200g, 300g, 400g.