---
kind: "section"
citation: "21 C.F.R. § 524.463"
title: "21"
number: "524.463"
heading: "Copper naphthenate."
url: "https://uscodex.org/cfr/21/524.463"
---

# §524.463. Copper naphthenate.

- (a) **Amount.** The drug is a 37.5 percent solution of copper naphthenate.
- (b) **Sponsors.** See Nos. 017135, 054771, and 058829 in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter.
- (c) **Conditions of use in horses—**
  - (1) **Amount.** Apply daily to affected hooves until fully healed.
  - (2) **Indications for use.** As an aid in treating horses and ponies for thrush caused by organisms susceptible to copper naphthenate.
  - (3) **Limitations.** Use on horses and ponies only. Avoid contact around eyes. Do not contaminate feed. Do not use in horses intended for human consumption.

## Notes

### Amendments

[47 FR 4250, Jan. 29, 1982, as amended at 68 FR 55825, Sept. 29, 2003; 71 FR 38074, July 5, 2006; 79 FR 10967, Feb. 27, 2014]

### Authority

Authority: 21 U.S.C. 360b.

### Source

Source: 40 FR 13873, Mar. 27, 1975, unless otherwise noted.

### Amendments

[47 FR 4250, Jan. 29, 1982, as amended at 68 FR 55825, Sept. 29, 2003; 71 FR 38074, July 5, 2006; 79 FR 10967, Feb. 27, 2014]