21 C.F.R. § 556.428 Narasin.
Title 21 - Food and Drugs
(a) Acceptable daily intake (ADI). The ADI for total residues of narasin is 5 micrograms per kilogram of body weight per day. (b) Tolerances—(1) Chickens (abdominal fat). The tolerance for parent narasin (the marker residue) is 480 parts per billion. (2) [Reserved] [66 FR 23589, May 9, 2001]
Title 21: Food and Drugs
PART 556—TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD
Subpart B—Specific Tolerances for Residues of New Animal Drugs
§ 556.428 Narasin.
