yourstate.us
Home / United States / 21 CFR
21 CFR 556.428

§ 556.428 Narasin.

United States · 21 CFR — Food and Drugs · Status: effective

Get this as JSONEmbed this
Cite this
Citation
21 CFR 556.428, § 556.428 Narasin, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/87793
Permanent ID
ys:prov:87793@1
SHA-256
3ffbe4e64a3baab6254aa6306847cdb1774c76b7d63032d78c342eed27bac01e

The hash is SHA-256 of this version's text, with every run of whitespace collapsed to a single space and the ends trimmed. The ID always leads back here, and checking it says whether the text you cited is still the current version.

Full text

(a) Acceptable daily intake (ADI). The ADI for total residue of narasin is 5 µg/kg of body weight per day. (b) Tolerances. The tolerance for narasin (marker residue) is: (1) Chickens. Abdominal fat (target tissue): 480 ppb. (2) [Reserved] (c) Related conditions of use. See §§ 558.363 and 558.364 of this chapter.

Legislative history

This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.