21 CFR § 556.330
Hygromycin B
June 25, 2020
(a) [Reserved]
(b) Tolerances. The tolerances for hygromycin B are:
(1) Chickens. Edible tissues: Zero.
(2) Swine. Edible tissues: Zero.
(c) Related conditions of use. See §558.274 of this chapter.