[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of April 1, 2001]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR573.180]

[Page 491]
 
                        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. 573.180  Anhydrous ammonia.

    (a) The food additive anhydrous ammonia is applied directly to corn 
plant material and thoroughly blended prior to ensiling. It is used or 
intended for use as a source of nonprotein nitrogen in cattle feed in 
accordance with paragraphs (a)(1), (2), or (3) as follows:
    (1)(i) The food additive anhydrous ammonia is applied as a component 
of an aqueous premix containing 16 to 17 percent ammonia, with molasses, 
minerals, and not less than 83 percent crude protein. The premix is a 
source of nonprotein nitrogen and minerals.
    (ii) In addition to the requirements of paragraph (b) of this 
section, the labeling shall bear an expiration date of not more than 10 
weeks after date of manufacture; a statement that additional protein 
should not be fed to lactating dairy cows producing less than 32 pounds 
of milk per day nor beef cattle consuming less than 1 percent of body 
weight daily in shelled corn; and a warning not to use additional trace 
mineral supplementation with treated silage.
    (2)(i) The food additive anhydrous ammonia is applied directly to 
corn plant material for use in dairy or beef cattle rations.
    (ii) The anhydrous ammonia is applied at a rate not to exceed the 
equivalent of 0.35 percent of the corn plant material.
    (iii) It is applied to corn plant material containing 30 to 35 
percent dry matter.
    (iv) It is applied so that 75 to 85 percent of the additive is 
liquid at ambient pressure.
    (3)(i) The food additive anhydrous ammonia is applied after being 
diluted to a 15 to 30 percent aqueous ammonia solution (by weight).
    (ii) The anhydrous ammonia solution is applied at a rate not to 
exceed anhydrous ammonia equivalent to 0.3 percent of the corn plant 
material.
    (iii) It is applied to corn plant material containing 28 to 38 
percent dry matter.
    (iv) The silage treated with aqueous ammonia is to be fed to dairy 
cattle only.
    (b) Its labeling shall bear, in addition to the other requirements 
of the act, the name of the additive, the concentration of ammonia, the 
maximum percentage of equivalent crude protein from nonprotein nitrogen, 
and directions for use consistent with this section.

[44 FR 40284, July 10, 1979]