BN82002 hydrochloride is a potent, selective, and irreversible inhibitor of the CDC25 phosphatase family. It inhibits CDC25A, CDC25B2, CDC25B3, CDC25C, and 25C-cat with IC50 values of 2.4, 3.9, 6.3, 5.4, and 4.6 μM, respectively. Additionally, BN82002 hydrochloride exhibits approximately 20-fold greater selectivity over CD45 tyrosine phosphatase.