[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: 21CFR573.914]

[Page 511]
 
                        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.  573.914  Salts of volatile fatty acids.

    (a) Identity. The food additive is a blend containing the ammonium 
or calcium salt of isobutyric acid and the ammonium or calcium salts of 
a mixture of 5-carbon acids--isovaleric, 2-methylbutyric, and n-valeric.
    (b) Specifications. The additive contains ammonium or calcium salts 
of volatile fatty acids and shall conform to the following 
specifications:
    (1) Ammonium salts:

------------------------------------------------------------------------
                Components                             Amount
------------------------------------------------------------------------
Ammonium salts of mixed 5-carbon acids (as  48 to 54 percent.
 identified in paragraph (a) of this
 section).
Ammonium salt of isobutyric acid..........  22 to 26 percent.
Water.....................................  28 percent maximum.
Ammonia...................................  0.3 percent maximum.
Arsenic...................................  3 parts per
                                             million.
Heavy metals as lead......................  10 parts per
                                             million.
------------------------------------------------------------------------

    (2) Calcium salts:

------------------------------------------------------------------------
                Components                             Amount
------------------------------------------------------------------------
Calcium salts of mixed 5-carbon acids (as   58 to 72 percent.
 identified in paragraph (a) of this
 section).
Calcium salt of isobutyric acid...........  26 to 34 percent.
Calcium hydroxide.........................  3 percent maximum.
Water.....................................  14 percent maximum.
Arsenic...................................  3 parts per
                                             million.
Heavy metals as lead......................  10 parts per
                                             million.
------------------------------------------------------------------------

    (c) Use. The additive is used or intended for use as a source of 
energy in dairy cattle feed.
    (d) Labeling. The label and labeling of the additive in any feed, 
feed supplement, feed concentrate, feed premix, or liquid feed 
supplement prepared therefrom shall bear, in addition to other 
information required by the act, the following:
    (1) The name of the additive.
    (2) Adequate directions for use, including statements expressing 
maximum use levels. For ammonium salts of volatile fatty acids, the 
statements: ``Not to exceed 160 grams per head per day thoroughly mixed 
in dairy cattle feed as a source of energy.'' For calcium salts of 
volatile fatty acids, the statement: ``Not to exceed 135 grams per head 
per day thoroughly mixed in dairy cattle feed as a source of energy.''

[49 FR 45125, Nov. 15, 1984; 50 FR 8606, Mar. 4, 1985]