[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: 21CFR573.480]

[Page 496]
 
                        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. 573.480  Formic acid.

    Formic acid may be safely used as a preservative in hay crop silage 
in an amount not to exceed 2.25 percent of the silage on a dry weight 
basis or 0.45 percent when direct-cut. The top foot of silage stored 
should not contain formic acid and silage should not be fed to livestock 
within 4 weeks of treatment.