Tripelennamine Hydrochloride Injection »Tripelennamine Hydrochloride Injection is a sterile solution of Tripelennamine Hydrochloride in Water for Injection.It contains not less than 90.0percent and not more than 110.0percent of the labeled amount of tripelennamine hydrochloride (C16H21N3·HCl). Packaging and storage— Preserve in tight,single-dose or multiple-dose Containers for Injections,as described under Injections á1ñ.Store at a controlled room temperature,and protect from light. Labeling— Label it to indicate that it is for veterinary use only. USP Reference standards á11ñ USP Endotoxin RS.USP Tripelennamine Hydrochloride RS. Identification— A:Identification—Organic Nitrogenous Bases á181ñ. B: The retention time of the major peak in the chromatogram of the Assay preparationcorresponds to that in the chromatogram of the Standard preparation,as obtained in the Assay. Bacterial endotoxins á85ñ It contains not more than 4.6USP Endotoxin Units per mg of tripelennamine hydrochloride. Sterility á71ñ It meets the requirements when tested as directed for Membrane Filtrationunder Test for Sterility of the Product to be Examined. pHá791ñ: between 6.0and 7.0. Particulate matter á788ñ: meets the requirements for small-volume injections. Other requirements— It meets the requirements under Injections á1ñ. Assay— Mobile phase— Dissolve 4.8g of monobasic potassium phosphate in 880mLof water in a 2-liter cylinder.Add 720mLof methanol and 400mLof acetonitrile,mix,filter,and degas.Make adjustments if necessary (see System Suitabilityunder Chromatography á621ñ). Standard preparation— Dissolve an accurately weighed quantity of USP Tripelennamine Hydrochloride RSquantitatively in water to obtain a solution having a known concentration of about 0.02mg per mL.Protect this solution from light. Assay preparation— Transfer an accurately measured volume of Injection,equivalent to about 4mg of tripelennamine hydrochloride,to a 200-mLvolumetric flask,dilute with water to volume,and mix. Chromatographic system (see Chromatography á621ñ)— The liquid chromatograph is equipped with a 254-nm detector,a 3.9-mm ×30-mm guard column that contains packing L1,and a 3.9-mm ×30-cm analytical column that contains packing L1.The flow rate is about 1mLper minute.Chromatograph the Standard preparation,and record the peak responses as directed for Procedure:the relative standard deviation for replicate injections is not more than 2.0%. Procedure— Separately inject equal volumes (about 20µL)of the Standard preparationand the Assay preparationinto the chromatograph,record the chromatograms,and measure the responses for the tripelennamine peaks.Calculate the quantity,in mg,of tripelennamine hydrochloride (C16H21N3·HCl)in each mLof the Injection taken by the formula: 200(C/V)(rU/rS), in which Cis the concentration,in mg per mL,of USP Tripelennamine Hydrochloride RSin the Standard preparation;Vis the volume,in mL,of Injection taken to prepare the Assay preparation;and rUand rSare the peak responses obtained from the Assay preparationand the Standard preparation,respectively. Auxiliary Information— Staff Liaison:Ian DeVeau,Ph.D.,Senior Scientist Expert Committee:(VET)Veterinary Drugs USP28–NF23Page 1990 Pharmacopeial Forum:Volume No.27(1)Page 1824 Phone Number:1-301-816-8178