21 CFR 558.363
§ 558.363 Narasin.
United States · 21 CFR — Food and Drugs · Status: effective
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- Citation
- 21 CFR 558.363, § 558.363 Narasin, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87875
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Full text
(a) Specifications. Type A medicated articles containing 36, 45, 54, 72, or 90 grams narasin per pound.
(b) Sponsor. See No. 058198 in § 510.600(c) of this chapter.
(c) Tolerances. See § 556.428 of this chapter.
(d) Special considerations. An expiration date of 2 months (8 weeks) is required for narasin Type C medicated swine feeds.
(e) Conditions of use. It is used as follows:
(1) Chickens—
(2) Swine—
(3) Narasin single-ingredient Type A medicated articles may also be used in combination with:
(i) Avilamycin as in § 558.68.
(ii) [Reserved]
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.