---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchE/part509"
level: "part"
label: "Part 509"
heading: "Unavoidable Contaminants in Animal Food and Food-Packaging Material"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchE-part509"
sections_count: 7
---

# Part 509 — Unavoidable Contaminants in Animal Food and Food-Packaging Material

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services › Subchapter E — Animal Drugs, Feeds, and Related Products

## Contents

- [Subpart A — General Provisions](/cfr/21/chI-subchE-part509-subpartA.md)
- [Subpart B — Tolerances for Unavoidable Poisonous or Deleterious Substances](/cfr/21/chI-subchE-part509-subpartB.md)
- [Subpart C — Regulatory Limits for Added Poisonous or Deleterious Substances [Reserved]](/cfr/21/chI-subchE-part509-subpartC.md)
- [Subpart D — Naturally Occurring Poisonous or Deleterious Substances [Reserved]](/cfr/21/chI-subchE-part509-subpartD.md)