Packaging and storage— Preserve in tight containers.

Labeling— Label it to indicate that it is for veterinary use only. Label it to state the content of bacitracin in terms of grams per pound, each gram of bacitracin being equivalent to 42,000 Bacitracin Units.

USP Reference standard 11— USP Bacitracin Zinc RS.

pH 791: between 8.0 and 9.5, in a solution containing 50 mg of specimen per mL.

Loss on drying 731— Dry about 100 mg, accurately weighed, in a capillary-stoppered bottle in vacuum at a pressure not exceeding 5 mm of mercury at 60 for 3 hours: it loses not more than 8.5% of its weight.

Residual solvents 467: meets the requirements.

Assay— Proceed with Powder as directed in the Assay under Soluble Bacitracin Methylene Disalicylate.

Expert Committee : (VET05) Veterinary Drugs 05

USP29–NF24 Page 235

Phone Number : 1-301-816-8178