[Code of Federal Regulations]
[Title 21, Volume 6]
[Revised as of April 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 21CFR556.283]

[Page 356]
 
                        TITLE 21--FOOD AND DRUGS
 
CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN 
                          SERVICES (CONTINUED)
 
PART 556_TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD--Table of 
 
     Subpart B_Specific Tolerances for Residues of New Animal Drugs
 
Sec.  556.283  Florfenicol.

    (a) Acceptable daily intake (ADI). The ADI for total residues of 
florfenicol is 10 micrograms per kilogram of body weight per day.
    (b) Tolerances--(1) Cattle--(i) Liver (the target tissue). The 
tolerance for florfenicol amine (the marker residue) is 3.7 parts per 
million (ppm).
    (ii) Muscle. The tolerance for florfenicol amine (the marker 
residue) is 0.3 ppm.
    (2) Swine--(i) Liver (the target tissue). The tolerance for parent 
florfenicol (the marker residue) is 2.5 ppm.
    (ii) Muscle. The tolerance for parent florfenicol (the marker 
residue) is 0.2 ppm.
    (3) Catfish. The tolerance for florfenicol amine (the marker 
residue) in muscle (the target tissue) is 1 ppm.
    (c) Related conditions of use. See Sec. Sec.  520.955, 522.955, and 
558.261 of this chapter.

[63 FR 41191, Aug. 3, 1998, as amended at 67 FR 78357, Dec. 24, 2002; 70 
FR 70046, Nov. 21, 2005]