eCFR Reference Browser

---

title: "21 CFR §556.226"

source: "https://www.ecfr.gov/current/title-21/section-556.226"

title_number: "21"

volume_number: "6"

chapter_number: "Unknown"

subchapter_code: "E"

subchapter_subject: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"

part_code: "556"

part_subject: "TOLERANCES FOR RESIDUES OF NEW ANIMAL DRUGS IN FOOD"

subpart_code: "B"

subpart_subject: "Specific Tolerances for Residues of New Animal Drugs"

section_number: "556.226"

section_subject: "Enrofloxacin."

cfr_reference: "21 CFR 556.226"

title_name: "Title 21"

title_subject: "Food and Drugs"

parts_covered: "Parts 500 to 599"

revised_date: "Revised as of April 1, 2019"

publication_date: "As of April 1, 2019"

contains_description: "Containing a codification of documents of general applicability and future effect"

publication_info: "Published by the Office of the Federal Register National Archives and Records Administration as a Special Edition of the Federal Register"

---

(a)Acceptable daily intake (ADI). The ADI for total residues of enrofloxacin is 3 micrograms per kilogram of body weight per day.

(b)Tolerances. The tolerances for enrofloxacin are:

(1)Cattle—(i) Liver (target tissue). 0.1 part per million (ppm) desethylene ciprofloxacin (the marker residue).

(ii)[Reserved]

(2)Swine—(i) Liver (target tissue). 0.5 ppm enrofloxacin (the marker residue).

(ii)[Reserved]

(c)Related conditions of use. See § 522.812 of this chapter.

§556.226 - Enrofloxacin.