eCFR Reference Browser

---

title: "21 CFR §558.555"

source: "https://www.ecfr.gov/current/title-21/section-558.555"

title_number: "21"

volume_number: "6"

chapter_number: "Unknown"

subchapter_code: "E"

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

part_code: "558"

part_subject: "NEW ANIMAL DRUGS FOR USE IN ANIMAL FEEDS"

subpart_code: "B"

subpart_subject: "Specific New Animal Drugs for Use in Animal Feeds"

section_number: "558.555"

section_subject: "Semduramicin."

cfr_reference: "21 CFR 558.555"

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)Specifications. Type A medicated article containing:

(1)

22.7 grams (g) per pound (lb) (50 g/kilogram (kg)) semduramicin (as semduramicin sodium).

(2)

22.7 g/lb (50 g/kg) semduramicin (as semduramicin sodium biomass).

(b)Approvals. See No. 066104 in § 510.600(c) of this chapter for use of product described in paragraph (a)(1) as in paragraph (d) of this section; for use of product described in paragraph (a)(2) as in paragraph (e) of this section.

(c)Related tolerances. See § 556.597 of this chapter.

(d)Conditions of use in chickens. It is used in chicken feed as follows:

(e)Conditions of use in chickens. It is used in chicken feed as follows:

(f)Semduramycin may also be used in combination with virginiamycin as in § 558.635.

§558.555 - Semduramicin.