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Pursuant to section 74 of the Canadian Environmental Protection Act, 1999 (CEPA), the Minister of the Environment and the Minister of Health have conducted a screening assessment of benzenesulfonic acid, 4-methyl-, hereinafter referred to as p-toluenesulfonic acid (PTSA). The Chemical Abstracts Service Registry Number (CAS RN) for PTSA is 104-15-4. This substance was identified as a priority for assessment as it met categorization criteria under subsection 73(1) of CEPA.
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