StacksVerified U.S. regulatory reference

21 CFR §558.185

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)Specifications. Type A medicated articles containing 1.12, 2.0, 11.2, or 50 percent coumaphos.
  2. (b)Sponsor. See No. 058198 in § 510.600(c) of this chapter.
  3. (c)Related tolerances. See § 556.168 of this chapter.
  4. (d)Special considerations.
    1. (1)Labeling shall bear the following warning: The active ingredient coumaphos is a cholinesterase inhibitor. Do not use this product on animals simultaneously or within a few days before or after treatment with, or exposure to, cholinesterase-inhibiting drugs, pesticides, or chemicals.
    2. (2)See § 500.25 of this chapter.
  5. (e)Conditions of use in laying chickens.