---
kind: "section"
citation: "21 C.F.R. § 556.50"
title: "21"
number: "556.50"
heading: "Amprolium."
url: "https://uscodex.org/cfr/21/556.50"
---

# §556.50. Amprolium.

- (a) [Reserved]
- (b) **Tolerances.** The tolerances for amprolium are:
  - (1) **Cattle.**
    - (i) **Liver, kidney, and muscle—** 0.5 ppm.
    - (ii) **Fat—** 2.0 ppm.
  - (2) **Chickens and turkeys.**
    - (i) **Liver and kidney—** 1 ppm.
    - (ii) **Muscle—** 0.5 ppm.
    - (iii) **Eggs—**
      - (A) **Egg yolks—** 8 ppm.
      - (B) **Whole eggs—** 4 ppm.
  - (3) **Pheasants.**
    - (i) **Liver—** 1 ppm.
    - (ii) **Muscle—** 0.5 ppm.
- (c) **Related conditions of use.** See §§ [520.100](/cfr/21/520.100.md), [558.55](/cfr/21/558.55.md), and [558.58](/cfr/21/558.58.md) of this chapter.

## Notes

### Authority

Authority: 21 U.S.C. 342, 360b, 371.

### Source

Source: 84 FR 32993, July 11, 2019, unless otherwise noted.