---
kind: "section"
citation: "21 C.F.R. § 556.230"
title: "21"
number: "556.230"
heading: "Erythromycin."
url: "https://uscodex.org/cfr/21/556.230"
---

# §556.230. Erythromycin.

- (a) [Reserved]
- (b) **Tolerances.** The tolerances for erythromycin are:
  - (1) **Cattle.**
    - (i) **Edible tissues (excluding milk)—** 0.1 ppm.
    - (ii) **Milk—** Zero.
  - (2) **Chickens and turkeys.**
    - (i) **Edible tissues (excluding eggs)—** 0.125 ppm.
    - (ii) **Eggs—** 0.025 ppm.
- (c) **Related conditions of use.** See §§ [520.823](/cfr/21/520.823.md), [522.820](/cfr/21/522.820.md), [526.820](/cfr/21/526.820.md), and [558.248](/cfr/21/558.248.md) of this chapter.

## Notes

### Amendments

[84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020]

### Authority

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

### Source

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

### Amendments

[84 FR 32993, July 11, 2019, as amended at 85 FR 18121, Apr. 1, 2020]