21 CFR 520.2520a
§ 520.2520a Trichlorfon and atropine.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 520.2520a, § 520.2520a Trichlorfon and atropine, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87361
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Full text
(a) Specifications.
(1) For trichlorfon: O,O-Dimethyl 2,2,2-trichloro-1-hydroxyethyl phosphonate.
(2) For atropine: Atropine N.F.
(b) Sponsor. See No. 054771 in § 510.600(c) of this chapter.
(c) Conditions of use in mice—(1) Amount. Administer 1.67 grams of trichlorfon and 7.7 milligrams of atropine per liter continuously for 7 to 14 days as the sole source of drinking water.
(2) Indications for use. For the treatment of Syphacia obvelata (pinworm) in laboratory mice.
(3) Limitations. Federal law restricts this drug to use by or on the order of a licensed veterinarian.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.