CFR > 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 (parts 500 to 590) > PART 573—FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALS > SUBPART B—Food Additive Listing (§573.120 to §573.1020) > 573.220—Feed-grade biuret.

573.220—Feed-grade biuret.

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 crude protein) 35 minimum.
(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.

Code of Federal Regulations

[41 FR 38652, Sept. 10, 1976, as amended at 68 FR 27904, May 22, 2003]