40 CFR § 455.31 - Specialized definitions.

---
identifier: "/us/cfr/t40/s455.31"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 455.31 - Specialized definitions."
title_number: 40
title_name: "Protection of Environment"
section_number: "455.31"
section_name: "Specialized definitions."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "455"
part_name: "PESTICIDE CHEMICALS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Secs. 301, 304, 306, 307, and 501, Pub. L. 92-500, 86 Stat. 816, Pub. L. 95-217, 91 Stat. 156, and Pub. L. 100-4 (33 U.S.C. 1311, 1314, 1316, 1317, and 1361)."
regulatory_source: "43 FR 17776, Apr. 25, 1978, unless otherwise noted."
cfr_part: "455"
---


# 455.31 Specialized definitions.

(a) “Metallo-organic active ingredients” means carbon containing active ingredients containing one or more metallic atoms in the structure.