{"data":{"id":"us/21-cfr-556.750","jurisdiction":"us","citation":"21 CFR 556.750","heading":"Virginiamycin.","body":"(a) Acceptable daily intake (ADI). The ADI for total residue of virginiamycin is 250 µg/kg of body weight per day.\n(b) Tolerances. The tolerances for virginiamycin are:\n(1) Cattle. Edible tissues (excluding milk): Not required.\n(2) Chickens. Edible tissues (excluding eggs): Not required.\n(3) Swine. (i) Kidney, skin, and fat: 0.4 ppm.\n(ii) Liver: 0.3 ppm.\n(iii) Muscle: 0.1 ppm.\n(c) Related conditions of use. See § 558.635 of this chapter.","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 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD","Subpart B—Specific Tolerances for Residues of Approved and Conditionally Approved 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":"7462ff6519fd75083f7b9cc2a8b26cf35842e499bec7da6f3f974a3fc7c281a0","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-556.748","next":"us/21-cfr-556.760"},"notice":"GroundRules: Original legal text. Not legal advice."}