StacksVerified U.S. regulatory reference

21 CFR §558.58

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Specifications. Type A medicated articles containing:
    1. (1)25 percent amprolium and 8 percent ethopabate or 5 percent amprolium and 1.6 percent ethopabate;
    2. (2)25 percent amprolium and 0.8 percent ethopabate or 5 percent amprolium and 0.16 percent ethopabate.
  2. (b)Sponsor. See No. 016592 in § 510.600(c) of this chapter.
  3. (c)Related tolerances. See §§ 556.50 and 556.260 of this chapter.
  4. (d)Special considerations. Do not use in Type B or Type C medicated feeds containing bentonite.
  5. (e)Conditions of use. It is used in chicken feed as follows:
  6. (f)Amprolium and ethopabate may also be used in combination with:
    1. (1)-(2) [Reserved]
    2. (3)Chlortetracycline as in § 558.128.