---
kind: "section"
citation: "21 C.F.R. § 529.1660"
title: "21"
number: "529.1660"
heading: "Oxytetracycline."
url: "https://uscodex.org/cfr/21/529.1660"
---

# §529.1660. Oxytetracycline.

- (a) **Specifications.**
  - (1) **Each gram of powder contains 366 milligrams (mg) oxytetracycline hydrochloride.**
  - (2) **Each gram of powder contains 753 mg oxytetracycline hydrochloride.**
- (b) **Sponsors.** See sponsors in [§ 510.600(c)](/cfr/21/510.600.md?p=c) of this chapter for use of products described in [paragraph (a)](#a) of this section as in [paragraph (d)](#d) of this section.
  - (1) **Nos.** 054771 and 061133 for use of product in [paragraph (a)(1)](#a-1) of this section.
  - (2) **Nos.** 054771, 061133, and 069254 for use of product described in [paragraph (a)(2)](#a-2) of this section.
- (c) **Related tolerances. See—** [§ 556.500](/cfr/21/556.500.md) of this chapter.
- (d) **Conditions of use in finfish—**
  - (1) **Amount.** Immerse fish in a solution containing 200 to 700 mg oxytetracycline hydrochloride (buffered) per liter of water for 2 to 6 hours.
  - (2) **Indications for use.** For skeletal marking of finfish fry and fingerlings.
  - (3) **Limitations.** Federal law restricts this drug to use by or on the order of a licensed veterinarian.

## Notes

### Amendments

[69 FR 6557, Feb. 11, 2004, as amended at 69 FR 61999, Oct. 22, 2004; 70 FR 41140, July 18, 2005; 72 FR 26289, May 9, 2007; 76 FR 17026, Mar. 28, 2011; 79 FR 10973, Feb. 27, 2014; 81 FR 22524, Apr. 18, 2016; 81 FR 94991, Dec. 27, 2016; 84 FR 8974, Mar. 13, 2019]

### Authority

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

### Source

Source: 40 FR 13881, Mar. 27, 1975, unless otherwise noted.

### Amendments

[69 FR 6557, Feb. 11, 2004, as amended at 69 FR 61999, Oct. 22, 2004; 70 FR 41140, July 18, 2005; 72 FR 26289, May 9, 2007; 76 FR 17026, Mar. 28, 2011; 79 FR 10973, Feb. 27, 2014; 81 FR 22524, Apr. 18, 2016; 81 FR 94991, Dec. 27, 2016; 84 FR 8974, Mar. 13, 2019]