# Food Additives Permitted in Feed and Drinking Water of Animals; Ethyl Cellulose
> **Food and Drug Administration** · Final rule. · Published 2024-06-07 · Effective 2024-06-07 · 89 FR 48507
## Document
- **Document number:** 2024-12533
- **Category:** fda-food
- **Sub-agency:** Food and Drug Administration
- **Federal Register citation:** 89 FR 48507
- **CFR reference:** 21 CFR 573
- **Publication date:** 2024-06-07
- **Effective date:** 2024-06-07
- **HHS docket:** Docket No. FDA-2023-F-0147
## Abstract

The Food and Drug Administration (FDA, we, or the Agency) is amending the regulations for food additives permitted in feed and drinking water of animals to provide for the safe use of ethyl cellulose as a matrix scaffolding for tracers, and the ethyl cellulose shall not exceed 80 percent of the tracer. This action is in response to a food additive petition filed by Micro-Tracers, Inc.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/06/07/2024-12533/food-additives-permitted-in-feed-and-drinking-water-of-animals-ethyl-cellulose)
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