{"data":{"id":"us/21-cfr-520.2520c","jurisdiction":"us","citation":"21 CFR 520.2520c","heading":"c Trichlorfon granules.","body":"(a) Specifications. Each package contains either 18.2 or 36.4 g of trichlorfon.\n(b) Sponsor. See No. 054771 in § 510.600(c) of this chapter.\n(c) Conditions of use in horses—(1) Amount. 18.2 milligrams per pound of body weight.\n(2) Indications for use. For horses for removal of bots (Gastrophilus nasalis, Gastrophilus intestinalis), large roundworms (ascarids, Parascaris equorum), and pinworms (Oxyuris equi).\n(3) Limitations. Do not use in horses intended for human consumption. Federal law restricts this drug to use by or on the order of a licensed veterinarian.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER E—ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS","PART 520—ORAL DOSAGE FORM NEW ANIMAL DRUGS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"e38d12b6b54a1124b4746893415410c5d92e67c1d4dfb87fd7cb0889d395da89","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-520.2520b","next":"us/21-cfr-520.2520d"},"notice":"GroundRules: Original legal text. Not legal advice."}