§ 520.2200b - Sulfachlorpyridazine powder.

(a) Specifications. Sodium sulfachlorpyridazine powder.

(b) Sponsor. See No. 053501 in § 510.600(c) of this chapter.

(c) Related tolerances. See § 556.630 of this chapter.

(d) Conditions of use. It is used as follows:

(1) Calves—(i) Amount. Administer 30 to 45 milligrams per pound (mg/lb) body weight per day in milk or milk replacer for 1 to 5 days in 2 divided doses twice daily.

(ii) Indications for use. For the treatment of diarrhea caused or complicated by E. coli (colibacillosis).

(iii) Limitations. Treated, ruminating calves must not be slaughtered for food during treatment or for 7 days after the last treatment. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal.

(2) Swine—(i) Amount. Administer 20 to 35 mg/lb body weight per day for 1 to 5 days in 2 divided doses twice daily:

(A) In drinking water; or

(B) For individual treatment, in an oral suspension containing approximately 42 mg sulfachlorpyridazine per milliliter in divided doses twice daily.

(ii) Indications for use. For the treatment of diarrhea caused or complicated by E. coli (colibacillosis).

(iii) Limitations. Treated swine must not be slaughtered for food during treatment or for 4 days after the last treatment.