EPA issued a final rule in the Federal Register of August 20, 2019 for 145 chemical substances that were the subject of premanufacture notices (PMNs). For the chemical substances that were the subjects of PMNs P-17-33, P-17-87, P-17-88 and P-17-101, EPA inadvertently listed incorrect Chemical Abstract Service (CAS) Registry Numbers. This document is being issued to correct these errors.