Regulations last checked for updates: Feb 16, 2025

Title 21 - Food and Drugs last revised: Feb 03, 2025
All TitlesTitle 21Chapter IPart 556Subpart B - Subpart B—Specific Tolerances for Residues of Approved and Conditionally Approved New Animal Drugs
View all text of Subpart B [§ 556.34 - § 556.770]
§ 556.344 - Ivermectin.

(a) Acceptable daily intake (ADI). The ADI for total residue of ivermectin is 5 µg/kg of body weight per day.

(b) Tolerances. The tolerances for 22,23-dihydroavermectin B1a (marker residue) are:

(1) American bison. Liver (target tissue): 15 ppb.

(2) Cattle. (i) Liver (target tissue): 1.6 ppm.

(ii) Muscle: 650 ppb.

(3) Reindeer. Liver (target tissue): 15 ppb.

(4) Sheep. Liver (target tissue): 30 ppb.

(5) Swine. (i) Liver (target tissue): 20 ppb.

(ii) Muscle: 20 ppb.

(c) Related conditions of use. See §§ 520.1192, 520.1195, 520.1197, 522.1192, 522.1193, 524.1193, and 558.300 of this chapter.

[84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020]
authority: 21 U.S.C. 342,360b,371
source: 84 FR 32993, July 11, 2019, unless otherwise noted.
cite as: 21 CFR 556.344
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