---
kind: "section"
citation: "21 C.F.R. § 558.185"
title: "21"
number: "558.185"
heading: "Coumaphos."
url: "https://uscodex.org/cfr/21/558.185"
---

# §558.185. Coumaphos.

- (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)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Related tolerances.** See [§ 556.168](/cfr/21/556.168.md) 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](/cfr/21/500.25.md) of this chapter.
- (e) **Conditions of use in laying chickens.**

## Notes

### Amendments

[86 FR 14822, Mar. 19, 2021]

### Authority

Authority: 21 U.S.C. 354, 360b, 360ccc, 360ccc-1, 371.

### Source

Source: 40 FR 13959, Mar. 27, 1975, unless otherwise noted.

### Amendments

[86 FR 14822, Mar. 19, 2021]