A thio analog of the purine base guanine that incorporates into DNA during replication, inducing double-strand breaks that destabilize its structure and result in cytotoxicity; used as a chemotherapeutic for acute leukemia and other types of cancer, including BRCA2-mutated tumors.

CAS: 154-42-7 EC No: 205-827-2 MDL No: MFCD00233553 RTECS: UP0740000 UN No: UN2811; Haz Class: 6.1; Packing Group: III Powder Molecular Formula: C₅H₅N₅S MW: 167.19 Melting Point: >300°

Synonym(s): 2-Amino-6-mercaptopurine, 2-Amino-6-purinethiol Formula: C5H5N5S Formula weight: 167.19 Purity: 98% CAS Number: 154-42-7 UN Number: UN2811 Hazard Class: 6.1 Packing Group: III Harmonized Tariff Code:  2933.59 Hazard Statements: H301-H341 Toxic if swallowed.…