Coumaphos.
21 C.F.R. § 558.185
in effectEffective: 2024-07-01(a) Specifications. Type A medicated articles containing 1.12, 2.0, 11.2, or 50 percent coumaphos.
(b) Sponsor. See No. 058198 in § 510.600(c) of this chapter.
(c) Related tolerances. See § 556.168 of this chapter.
(d) Special considerations. (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) See § 500.25 of this chapter.
(e) Conditions of use in laying chickens.
Source: eCFRURL: https://www.ecfr.gov/api/versioner/v1/full/2024-07-01/title-21.xmlFetched: 7/26/2026
