{"data":{"id":"us/21-cfr-573.225","jurisdiction":"us","citation":"21 CFR 573.225","heading":"1,3-Butylene glycol.","body":"The food additive 1,3-butylene glycol (1,3-butanediol) may be safely used in accordance with the following prescribed conditions:\n(a) It complies with the specifications in § 173.220(a) of this chapter.\n(b) It is intended for use in swine feed as a source of energy.\n(c) It is to be thoroughly mixed into feed at levels not to exceed 9 percent of the dry matter of the total ration.\n(d) 1,3-Butylene glycol should be mixed in feed with equipment adapted for the addition of liquids, and the feed should be mixed not less than 5 minutes after its addition.","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 573—FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALS","Subpart B—Food Additive Listing"],"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":"b58f83effbde94166d6525e05066dfb270b7dbf544946bf4303f595560feaaf0","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-573.220","next":"us/21-cfr-573.230"},"notice":"GroundRules: Original legal text. Not legal advice."}