StacksVerified U.S. regulatory reference

21 CFR §556.640

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)[Reserved]
  2. (b)Tolerances. The tolerances for sulfadimethoxine are:
    1. (1)Catfish and salmonids. Edible tissues: 0.1 ppm.
    2. (2)Cattle.
      1. (i)Edible tissues (excluding milk): 0.1 ppm.
      2. (ii)Milk: 0.01 ppm.
    3. (3)Chickens, turkeys, ducks, and chukar partridges. Edible tissues (excluding eggs): 0.1 ppm.
  3. (c)Related conditions of use. See §§ 520.2220a, 520.2220d, 520.2220e, 522.2220, and 558.575 of this chapter.