Key takeaway
What This Development Means
EPA’s proposed TSCA SNUR package covers 14 chemical entries used across catalysts, fragrances, cleaning, graphene applications and semiconductor production. Companies should map substances and uses, review exposure and release controls, and consider comments by 31 August 2026. Any final rule would require notification and EPA clearance for specified new uses.
What Would The Proposed TSCA SNUR Require?
A TSCA SNUR identifies activities EPA considers significant new uses of a chemical. If the proposal becomes final, a manufacturer, importer or processor planning one of those uses must submit significant new use notice at least 90 days beforehand. The activity cannot begin until EPA completes review and allows it.
How Should Companies Prepare For The TSCA SNUR Proposal?
Companies should compare CAS numbers, generic names and PMN references with purchasing, inventory and product-development records. They should examine processing conditions, worker protection, safety data sheets, consumer applications, production volumes and water releases. Importers and exporters should also review existing TSCA certification and notification duties with specialist advisers before acting.
Source basis: US Environmental Protection Agency, Significant New Use Rules on Certain Chemical Substances (26-4) (30 July 2026)
The US Environmental Protection Agency has proposed TSCA significant new use rules for 14 chemical entries spanning catalysts, fragrances, industrial cleaners, graphene materials and semiconductor chemicals. Published on 30 July 2026, the proposal would require manufacturers, importers or processors to notify EPA at least 90 days before starting a listed significant new use and wait for EPA review.
Comments on the TSCA SNUR proposal close on 31 August 2026. The measure is not yet a final rule. Existing TSCA section 5(e) Orders remain binding on their original premanufacture-notice submitters while EPA considers whether to extend comparable controls across the market.
TSCA SNUR Proposal Reaches Multiple Supply Chains
The substances include pyrophoric aluminoxane and zirconium catalyst reaction products; fragrance ingredients used in household products; a surfactant intended for industrial cleaning; turbostratic graphene for coatings, energy storage, resins and composites; photoresist ingredients; and tertiary-butylarsine used in semiconductor manufacture.
EPA identifies potential concerns including skin, eye and respiratory corrosion or irritation, sensitisation, lung and systemic effects, neurotoxicity, reproductive or developmental effects, persistence and aquatic toxicity. The proposed significant new uses reflect controls already contained in TSCA orders.
Notification Could Precede New Chemical Uses By 90 Days
Depending on the substance, controls include enclosed processing, personal protective equipment, respirators, hazard communication, consumer-use or concentration limits, production-volume caps, incineration and restrictions on water releases. A final TSCA SNUR would make departures from specified conditions subject to prior notification and EPA clearance.
Chemical manufacturers, formulators, importers, electronics and battery suppliers, coatings businesses, fragrance companies and industrial-cleaning supply chains should match CAS numbers, generic identities and PMN references against inventories. They should also review intended uses, worker exposure controls, safety data sheets, releases and customer applications.
Businesses planning comments should use docket EPA-HQ-OPPT-2026-2707 and avoid placing confidential business information in the public submission system. No later correction, withdrawal or replacement was found by 3 August 2026.
Summary
EPA’s proposed TSCA SNUR package covers 14 chemical entries used across catalysts, fragrances, cleaning, graphene applications and semiconductor production. Companies should map substances and uses, review exposure and release controls, and consider comments by 31 August 2026. Any final rule would require notification and EPA clearance for specified new uses.
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