Last amended:2019Year:2026Length:52 wordsSubsections:3Official source
Cite as 21 C.F.R. § 556.428 (2026)
(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.