# Revocation of TSCA Section 4 Testing Requirements for One High Production Volume Chemical Substance
> **Rule** · Final rule. · Published 2013-05-13 · Effective 2013-06-12 · 78 FR 27860
## Document
- **Document number:** 2013-11313
- **Category:** chemical-tsca
- **Federal Register citation:** 78 FR 27860
- **CFR reference:** 40 CFR 799
- **Publication date:** 2013-05-13
- **Effective date:** 2013-06-12
- **EPA docket:** EPA-HQ-OPPT-2005-0033
## Abstract

This final rule implements EPA's decision to revoke certain testing requirements promulgated under the Toxic Substance Control Act (TSCA) for the High Production Volume (HPV) chemical substance, benzenesulfonic acid, [[4-[[4-(phenylamino)phenyl][4-(phenylimino)-2,5- cyclohexadien-1-ylidene]methyl]phenyl]amino]- (CAS No. 1324-76-1), also known as C.I. Pigment Blue 61. After publication in the Federal Register of a final rule requiring testing for C.I. Pigment Blue 61, EPA received adequate, existing studies which eliminated the need for testing.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2013/05/13/2013-11313/revocation-of-tsca-section-4-testing-requirements-for-one-high-production-volume-chemical-substance)
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