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Code of Federal Regulations Title 21. Food and Drugs § 21.558.254 Famphur

Current as of January 02, 2025 | Updated by Findlaw Staff

(a) Specifications. Type A medicated articles containing 13.2 or 33.3 percent famphur.

(b) Sponsor. See No. 000061 in § 510.600(c) of this chapter.

(c) Related tolerances. See § 556.273 of this chapter.

(d) Special considerations. Famphur is a cholinesterase inhibitor. Do not use this product in animals simultaneously or within a few days before or after treatment with or exposure to cholinesterase-inhibiting drugs, pesticides, or chemicals.

(e) Conditions of use. It is used in cattle feed as follows:

Table 2—Size Proxies for SRCs in 2016

Famphur in grams/ton

Indications for use

Limitations

Sponsor

(i) 1.1 milligrams per pound (mg/lb) body weight per day

Beef cattle and nonlactating dairy cows: For control of grubs and as an aid in control of sucking lice

Feed for 30 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter

000061

(ii) 2.3 mg/lb body weight per day

Beef cattle and nonlactating dairy cows: For control of grubs

Feed for 10 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter

000061
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Cite this article: FindLaw.com - Code of Federal Regulations Title 21. Food and Drugs § 21.558.254 Famphur - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-21-food-and-drugs/cfr-sect-21-558-254/

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