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Withdrawal of TSCA New Chemicals SNUR Published Today

03/26/14

Source: Federal Register
Related Topics: Toxic Substances Control Act (TSCA) US Environmental Protection Agency
Today, EPA published the attached withdrawal of a proposed SNUR (April 18, 2013; 78 FR 23184) on PMN substances P-12-298 and P-12-299.  This action is being taken based upon experimental data provided by the PMN submitter, and relevant environmental fate and toxicity data associated with cyanoacrylates submitted to the Agency during the public comment period for the proposed SNUR.  The Agency determined that this information demonstrated that cyanoacrylates, rather than esters identified in the proposed rule, are more appropriate structural analogues for assessment of potential toxicity of the PMN substances to aquatic organisms, which was the basis for the notification requirements in the proposed SNUR.   Based on review of experimental data provided by the PMN submitter, and relevant environmental fate and toxicity data associated with cyanoacrylates, the Agency no longer supports the original concerns for toxicity to aquatic organisms.  The Agency’s previous concerns for ecotoxicity are mitigated due to the fact that, like cyanoacrylates, the PMN substances react quickly in the presence of water or moisture and the hydrolysis products are not expected to produce toxic effects to aquatic organisms at saturation. 






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