StacksVerified U.S. regulatory reference

21 CFR §573.225

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The food additive 1,3-butylene glycol (1,3-butanediol) may be safely used in accordance with the following prescribed conditions:
  1. (a)It complies with the specifications in § 173.220(a) of this chapter.
  2. (b)It is intended for use in swine feed as a source of energy.
  3. (c)It is to be thoroughly mixed into feed at levels not to exceed 9 percent of the dry matter of the total ration.
  4. (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.