[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR573.220]

[Page 500]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 573--FOOD ADDITIVES PERMITTED IN FEED AND DRINKING WATER OF ANIMALS--Table of Contents
 
                    Subpart B--Food Additive Listing
 
Sec.  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   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.
    (iii) The statement ``Do not feed to animals producing milk for 
human consumption.''
    (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.