21 CFR § 529.1115 - Halothane.

---
identifier: "/us/cfr/t21/s529.1115"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "21 CFR § 529.1115 - Halothane."
title_number: 21
title_name: "Food and Drugs"
section_number: "529.1115"
section_name: "Halothane."
chapter_name: "FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES"
subchapter_number: "E"
subchapter_name: "ANIMAL DRUGS, FEEDS, AND RELATED PRODUCTS"
part_number: "529"
part_name: "CERTAIN OTHER DOSAGE FORM NEW ANIMAL DRUGS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "21 U.S.C. 360b."
regulatory_source: "40 FR 13881, Mar. 27, 1975, unless otherwise noted."
cfr_part: "529"
---


# 529.1115 Halothane.

(a) *Specifications.* The drug is a colorless, odorless, nonflammable, nonexplosive, heavy liquid containing 0.01 percent thymol as a preservative.

(b) *Sponsor.* See No. 054771 in § 510.600(c) of this chapter.

(c) *Conditions of use*—(1) *Amount.* Two to 5 percent of inhaled atmosphere for induction of anesthesia; 0.5 to 2 percent for maintenance of anesthesia.

(2) *Indications for use.* For nonfood animals for the induction and maintenance of anesthesia.

(3) *Limitations.* Not for use in animals intended for food. Federal law restricts this drug to use by or on the order of a licensed veterinarian.

[46 FR 27915, May 22, 1981, as amended at 62 FR 29014, May 29, 1997; 79 FR 10973, Feb. 27, 2014; 85 FR 4208, Jan. 24, 2020]