---
kind: "unit"
title: "21"
title_heading: "Food and Drugs"
key: "chI/subchJ"
level: "subchap"
label: "Subchapter J"
heading: "Radiological Health"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/21/chI-subchJ"
sections_count: 65
---

# Subchapter J — Radiological Health

Title 21 C.F.R. — Food and Drugs › Chapter I — Food and Drug Administration, Department of Health and Human Services

## Contents

- [Part 1000 — General](/cfr/21/chI-subchJ-part1000.md)
- [Part 1002 — Records and Reports](/cfr/21/chI-subchJ-part1002.md)
- [Part 1003 — Notification of Defects or Failure to Comply](/cfr/21/chI-subchJ-part1003.md)
- [Part 1004 — Repurchase, Repairs, or Replacement of Electronic Products](/cfr/21/chI-subchJ-part1004.md)
- [Part 1005 — Importation of Electronic Products](/cfr/21/chI-subchJ-part1005.md)
- [Part 1010 — Performance Standards for Electronic Products: General](/cfr/21/chI-subchJ-part1010.md)
- [Part 1020 — Performance Standards for Ionizing Radiation Emitting Products](/cfr/21/chI-subchJ-part1020.md)
- [Part 1030 — Performance Standards for Microwave and Radio Frequency Emitting Products](/cfr/21/chI-subchJ-part1030.md)
- [Part 1040 — Performance Standards for Light-Emitting Products](/cfr/21/chI-subchJ-part1040.md)