CAS 3483-12-3 appears in our catalog under these names: 1,4-Dithio-DL-threitol, 98% , Dithiothreitol, 99.5+%, Molecular Biology Grade, Ultrapure, , 1,4-Dithio-DL-threitol, Electrophoresis Grade, 99% . Offered by: Thermo Scientific (Alfa Aesar). Available pack sizes: 1g, 5g, 25g, 100g.