This final rule implements EPA's decision to revoke certain testing requirements promulgated under the Toxic Substance Control Act (TSCA) for the High Production Volume (HPV) chemical substance, benzenesulfonic acid, [[4-[[4-(phenylamino)phenyl][4-(phenylimino)-2,5- cyclohexadien-1-ylidene]methyl]phenyl]amino]- (CAS No. 1324-76-1), also known as C.I. Pigment Blue 61. After publication in the Federal Register of a final rule requiring testing for C.I. Pigment Blue 61, EPA received adequate, existing studies which eliminated the need for testing.