# Animal Drugs, Feeds, and Related Products; Regulation of Carcinogenic Compounds in Food-Producing Animals
> **Food and Drug Administration** · Final rule. · Published 2012-08-22 · Effective 2012-09-21 · 77 FR 50591
## Document
- **Document number:** 2012-20609
- **Category:** other
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 77 FR 50591
- **CFR reference:** 21 CFR 500
- **Publication date:** 2012-08-22
- **Effective date:** 2012-09-21
- **HHS docket:** Docket No. FDA-2010-N-0612
## Abstract

The Food and Drug Administration (FDA) is amending its regulations regarding compounds of carcinogenic concern used in food- producing animals. Specifically, the Agency is clarifying the definition of "S<INF>o</INF>" and revising the definition of "S<INF>m</INF>" so that it conforms to the clarified definition of S<INF>o</INF>. Other clarifying and conforming changes are also being made.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2012/08/22/2012-20609/animal-drugs-feeds-and-related-products-regulation-of-carcinogenic-compounds-in-food-producing)
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