---
kind: "section"
citation: "21 C.F.R. § 556.750"
title: "21"
number: "556.750"
heading: "Virginiamycin."
url: "https://uscodex.org/cfr/21/556.750"
---

# §556.750. Virginiamycin.

- (a) **Acceptable daily intake (ADI).** The ADI for total residue of virginiamycin is 250 µg/kg of body weight per day.
- (b) **Tolerances.** The tolerances for virginiamycin are:
  - (1) **Cattle.** Edible tissues (excluding milk): Not required.
  - (2) **Chickens.** Edible tissues (excluding eggs): Not required.
  - (3) **Swine.**
    - (i) **Kidney, skin, and fat—** 0.4 ppm.
    - (ii) **Liver—** 0.3 ppm.
    - (iii) **Muscle—** 0.1 ppm.
- (c) **Related conditions of use.** See [§ 558.635](/cfr/21/558.635.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]