21 CFR § 520.2520aChapter I

§ 520.2520a Trichlorfon and atropine.

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Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.

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Specifications.(a) (1) For trichlorfon: O,O-Dimethyl 2,2,2-trichloro-1-hydroxyethyl phosphonate.

(2) For atropine: Atropine N.F.

Sponsor.(b) See No. 054771 in § 510.600(c) of this chapter.

Conditions of use in miceAmount.(c) —(1) 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.

Indications for use.Syphacia obvelata(2) For the treatment of (pinworm) in laboratory mice.

Limitations.(3) Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[79 FR 28832, May 20, 2014]

eCFR data current as of: June 10, 2026

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