Allopurinol EP Impurity A

• Catalogue #: AR-A03234
• CAS #: 27511-79-1
• Alternate CAS #: 5334-31-6 (free base)
• Molecular Formula: C₄H₆N₄O. ₁/₂H₂O₄S
• Molecular weight: 126.12,49.03