556.240—Estradiol and related esters.
No residues of estradiol, resulting from the use of estradiol or any of the related esters, are permitted in excess of the following increments above the concentrations of estradiol naturally present in untreated animals:
(a)
In uncooked edible tissues of heifers, steers, and calves:
(1)
120 parts per trillion for muscle.
(2)
480 parts per trillion for fat.
(3)
360 parts per trillion for kidney.
(4)
240 parts per trillion for liver.
Code of Federal Regulations
[49 FR 13873, Apr. 9, 1984, as amended at 56 FR 67175, Dec. 30, 1991; 76 FR 16291, Mar. 23, 2011]