The food additive feed grade biuret may be safely used in ruminant feed in accordance with the following prescribed conditions:
(a) The food additive is the product resulting from the controlled pyrolysis of urea conforming to the following specifications: ------------------------------------------------------------------------
Percent------------------------------------------------------------------------Biuret................................... 55 minimum.Urea..................................... 15 maximum.Cyanuric acid and triuret................ 30 maximum.Mineral oil.............................. 0.5 maximum.Total nitrogen (equivalent to 218.75 pct 35 minimum.
crude protein).------------------------------------------------------------------------
(b) It is used in ruminant feeds as a source of nonprotein nitrogen.
(c) To assure safe use of the additive:
(1) The label and labeling of the additive and that of any feed additive supplement, feed additive concentrate, feed additive premix, or complete feed prepared therefrom shall contain, in addition to other information required by the act, the following:
(i) The name of the additive.
(ii) The maximum percentage of equivalent crude protein from nonprotein nitrogen.
(2) The label shall recommend that the diet be balanced to provide adequate nutrients when equivalent crude protein from all forms of nonprotein nitrogen exceed one-third of the total crude protein in the total daily ration. [41 FR 38652, Sept. 10, 1976, as amended at 68 FR 27904, May 22, 2003] Sec. 573.225 1,3-Butylene glycol.
The food additive 1,3-butylene glycol (1,3-butanediol) may be safely used in accordance with the following prescribed conditions:
(a) It complies with the specifications in Sec. 173.220(a) of this chapter.
(b) It is intended for use in swine feed as a source of energy.
(c) It is to be thoroughly mixed into feed at levels not to exceed 9 percent of the dry matter of the total ration.
(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. [53 FR 40061, Oct. 13, 1988]