CAS 1004-40-6 appears in our catalog under these names: 6-Aminothiouracil, 98%, 6-Aminothiouracil 98%, 6–Amino–4–hydroxy–2–mercaptopyrimidine, 6-Amino-4-hydroxy-2-mercaptopyrimidine, 95%, 4-Amino-6-hydroxy-2-mercaptopyrimidine, >98.0%(T). Offered by: Thermo Scientific (Acros), Ambeed, GLPBio, Fluorochem, TCI. Available pack sizes: 5g, 25g, 1g, 10g, 100g, 500g.