The Environmental Protection Agency has withdrawn a direct final significant new use rule that would have imposed import restrictions on three chemical substances that were the subject of a premanufacture notice beginning Dec. 1. These substances are isocyanate prepolymer (generic), methylene diisocyanate polymer with diols and triols (generic), and polymer of isophorone diisocyanate and amine-terminated propoxylatedpolyol (generic). The EPA now intends to publish proposed SNURs for these substances.


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