# Modification of Significant New Uses of Certain Chemical Substances
> **Rule** · Final rule. · Published 2002-03-20 · Effective 2002-05-20 · 67 FR 12882
## Document
- **Document number:** 02-6725
- **Category:** chemical-tsca
- **Federal Register citation:** 67 FR 12882
- **CFR reference:** 40 CFR 721
- **Publication date:** 2002-03-20
- **Effective date:** 2002-05-20
- **EPA docket:** OPPTS-50642A
## Abstract

Under section 5(a)(2) of the Toxic Substances Control Act (TSCA) and 40 CFR 721.185, EPA is amending two significant new use rules (SNURs) to allow certain uses without requiring a significant new use notice (SNUN). EPA is amending these rules based on review of new toxicity and exposure data. The amended SNURs would continue to require a SNUN for new uses that may involve significant changes in human or environmental exposure

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2002/03/20/02-6725/modification-of-significant-new-uses-of-certain-chemical-substances)
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