StacksVerified U.S. regulatory reference

21 CFR §558.55

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Specifications. Type A medicated article containing 25 percent amprolium.
  2. (b)Sponsor. No. 016592 in § 510.600(c) of this chapter.
  3. (c)Related tolerances. See § 556.50 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—(1) Cattle. It is used as follows:
    1. (2)Chickens. It is used as follows:
    2. (3)Turkeys. It is used as follows:
    3. (4)Pheasants. It is used as follows:
    4. (5)Permitted combinations. Amprolium may also be used in combination with:
      1. (i)Virginiamycin as in § 558.635.
      2. (ii)[Reserved]