[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: 21CFR573.600]

[Page 506]
 
                        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.  573.600  Lignin sulfonates.

    Lignin sulfonates may be safely used in animal feeds in accordance 
with the following prescribed conditions:
    (a) For the purpose of this section, the food additive is either 
one, or a combination of, the ammonium, calcium, magnesium, or sodium 
salts of the extract of spent sulfite liquor derived from the sulfite 
digestion of wood or of abaca (Musa textilis) or of sisal (Agave 
sisalana) in either a liquid form (moisture not to exceed 50 percent by 
weight) or dry form (moisture not to exceed 6 percent by weight).
    (b) It is used or intended for use in an amount calculated on a dry 
weight basis, as follows:
    (1) As a pelleting aid in the liquid or dry form in an amount not to 
exceed 4 percent of the finished pellets.
    (2) As a binding aid in the liquid form in the flaking of feed 
grains in an amount not to exceed 4 percent of the flaked grain.
    (3) As a surfactant in molasses used in feeds, as liquid lignin 
sulfonate, in an amount not to exceed 11 percent of the molasses.
    (4) As a source of metabolizable energy, in the liquid or dry form, 
in an amount not to exceed 4 percent of the finished feed.