The U.S. Environmental Protection Agency (EPA) has issued Significant New Use Rules (SNURs) under the Toxic Substances Control Act (TSCA) for thirty four chemical substances that were previously submitted through premanufacture notices (PMNs) and are also subject to EPA-issued Orders under TSCA. These SNURs mandate that any entity intending to manufacture (including import) or process the listed chemicals for a use defined as a "significant new use" must notify the EPA at least 90 days in advance. This notification initiates EPA's evaluation of the proposed use, ensuring that potential environmental and health impacts are properly assessed. The chemical activity cannot begin until the EPA has reviewed the notification, made a determination, and taken any necessary regulatory actions. This measure aims to provide oversight and control over potentially hazardous uses of chemicals before they enter the market or supply chain. The rule becomes effective on August 12, 2025.
Following are the chemical substances got approval for Significant New Use Rules (SNUR) under TSCA:
1. Unsaturated dicarboxylic acid polymer with 2-(dialkylamino)alkyl-alkyl-alkanoate, N,N-dialkyl-alkene amide, 2-propenamide and salt of alkyl-substituted alkene sulfonate (generic)
2. Octadecanoic acid, 12-hydroxy-, polymer with aziridine, 2-oxepanone and tetrahydro-2H-pyran-2-one, reaction products with disubstituted heteropolycycle (generic)
3. Ethyl 4-alkyl-2-oxocycloalkanecarboxylate (generic)
4. Sulfonium, tricarbocyclic-, polyfluoropolyhydro-2,2-dicarbocyclic -4,7-methano-1,3-benzodioxole-5-alkanesulfonate (1:1) (generic)
5. Sulfonium, tricarbocyclic-, 2-[3,5-bis(haloalkyl)phenyl]-.alpha., .alpha., .beta., .beta.-polyhalopolyhydro-2-alkyl-4,7-alkano-1,3-heteropolycyclic-5-alkanesulfonate (1:1) generic)
6. Sulfonium, tricarbocyclic-, 2-(4-alkoxyhalocarbomonocyclic)-.alpha., .alpha., .beta., .beta.-polyhalopolyhydro-4,7-methano-1,3-heteropolycyclic-5-alkanesulfonate (1:1) (generic)
7. Sulfonium, monocarbocyclicbisarylpolyhaloalkyl, .alpha., .alpha., .beta., .beta.-polyhalopolyhydro-2,2-diaryl-4,7-methano-1,3-heteropolycyclic-5-alkanesulfonate (1:1) (generic)
8. Sulfonium, bis(3,4-polyhalocarbocyclic)aryl-, .alpha., .alpha., .beta., .beta.-polyhalopolyhydro-2,2-diaryl-4,7-methano-1,3-heteropolycyclic-5-alkanesulfonate (1:1) (generic)
9. Sulfonium, tricarbocyclic-, 2-heteroatom-substituted-4-(halocarbocyclic)carboxylate (1:1) (generic)
10. Fatty acids, reaction products with polyamine-polyacid polymer and fatty acid (generic)
11. Poly[oxy(methyl-1,2-ethandiyl)], .alpha.-(dithiocarboxy)-.omega.-(1-methylethoxy)-, sodium salt (1:1)
12. Poly[oxy(methyl-1,2-ethandiyl)], .alpha.-(dithiocarboxy)-.omega.-butoxy-, sodium salt (1:1)
13. 1,4-Cyclohexanedicarboxylic acid, 1,4-dinonyl ester, branched and linear.
14. 1,3-Butadiene, homopolymer, hydrogenated, 2-(ethenyloxy)ethyl-terminated
15. Lignin, modified, reaction products with alkylamine by-products, hydrochlorides (generic)
16. Lignin, modified, reaction products with alkylamine by-products (generic)
17. Sulfonium, triphenyl-, salt with fluoroalkyl 5-sulfobicyclo[2.2.1]heptane carboxylate (1:1) (generic)
18. Triazine-trione, tris(isocyanatoalkyl)-, polymer with substituted diisocyanato alkylcarbomonocycle, hydro-hydroxypoly(oxyalkanediyl)and hydro-hydroxypoly[oxy(alkyl-alkanediyl)], aliphatic alkyl amine-blocked (generic)
19. Lithium metal oxide (generic)
20. Soybean oil, oleic acid-high, epoxidized
21. Sulfonium, (halocarbomonocycle)diphenyl-, salt with 1-heterosubstituted-2-methylalkyl trihalobenzoate (1:1) (generic)
22. 1,6-Disubstituted hexane (generic)
23. 1,3-Propanediaminium, 2-hydroxy-N1,N1,N1,N3,N3-pentamethyl-N3-tetradecyl-, chloride (1:2); 1,3-Propanediaminium, N1-hexadecyl-2-hydroxy-N1,N1,N3,N3,N3-pentamethyl-, chloride (1:2); 1,3-Propanediaminium, 2-hydroxy-N1,N1,N1,N3,N3-pentamethyl-N3-octadecyl-, chloride (1:2); 1,3-Propanediaminium, 2-hydroxy-N1,N1,N1,N3,N3-pentamethyl-N3-octadecen-1-yl, chloride (1:2)
24. Alkanes, branched and linear (generic)
25. Polyester with 1,4-benzenedicarboxylic acid, 1,4- dimethyl 1,4-benzenedicarboxylate, 2,2-dimethyl-1,3-propanediol, dodecanedioic acid, 1,2-ethanediol, aliphatic polyester, 3-hydroxy-2,2-dimethylpropyl 3-hydroxy-2,2-dimethylpropanoate, 1,3-isobenzofurandione and 1,1′-methylenebis[isocyanatobenzene] (generic)
26. Polyester with 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol, dodecanedioic acid, 1,2-ethanediol, aliphatic polyester, 3-hydroxy-2,2-dimethylpropyl 3-hydroxy-2,2-dimethylpropanoate, 1,3-isobenzofurandione and 1,1′-methylenebis[4-isocyanatobenzene] (generic)
27. Polyester with 1,4-benzenedicarboxylic acid, 2,2-dimethyl-1,3-propanediol, dodecanedioic acid, 1,2-ethanediol, aliphatic polyester, 3-hydroxy-2,2-dimethylpropyl 3-hydroxy-2,2-dimethylpropanoate, 1,3-isobenzofurandione and 1,1′-methylenebis[isocyanatobenzene] (generic)
28. Aromatic sulfonium tricyclo fluoroalkyl sulfonic acid salt (generic)
29. Fluoroheteroacid, metal salt (generic)
30. Hydrocarbons, C5-10
31. Sulfonium, tricarbocyclic-, .alpha., .alpha., .beta., .beta.-polyhalopolyhydro-heteropolycyclic-5-alkanesulfonate (1:1) (generic)
32. Sulfonium, tricarbocyclic-, 2-heteroatom-substituted-4-alkylcarbomonocyclecarboxylate (1:1) (generic)
33. Sulfonium, tricarbocyclic-, salt with [polyhydro-2-alkyl-5-(polyhalo-2-heteroalkyl)-alkano-1,3-hetropolycyclic]alkyl polyhaloaryl ester (1:1) (generic)
34. Sulfonium, tricarbocyclic-, .alpha., .alpha., .beta., .beta.-polyhalopolyhydro-heteropolycyclic-5-alkanesulfonate (1:1) (generic)

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U.S. Environmental Protection Agency (EPA); Significant New Use Rules (SNURs); Toxic Substances Control Act (TSCA); Fluoroheteroacid, metal salt (generic)