1,2,3-Propanetricarboxylic acid, 2-hydroxy-, tripotassium salt, monohydrate.
Tripotassium citrate monohydrate [6100-05-6].
Anhydrous 306.40 [866-84-2].
» Potassium Citrate contains not less than 99.0 percent and not more than 100.5 percent of C6H5K3O7, calculated on the dried basis.
Packaging and storage Preserve in tight containers.
Alkalinity A solution of 1.0 g in 20 mL of water is alkaline to litmus, but after the addition of 0.20 mL of 0.10 N sulfuric acid, no pink color is produced by the addition of 1 drop of phenolphthalein TS.
Loss on drying 731 Dry it at 180 for 4 hours: it loses between 3.0% and 6.0% of its weight.
Tartrate To a solution of 1 g in 1.5 mL of water in a test tube add 1 mL of 6 N acetic acid, and scratch the walls of the test tube with a glass rod: no crystalline precipitate is formed.
Heavy metals, Method I 231 Dissolve 2 g in 25 mL of water, and proceed as directed for Test Preparation, except to use glacial acetic acid to adjust the pH: the limit is 0.001%.
Assay Dissolve about 200 mg of Potassium Citrate, accurately weighed, in 25 mL of glacial acetic acid. Add 2 drops of crystal violet TS, and titrate with 0.1 N perchloric acid VS to a green endpoint. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N perchloric acid is equivalent to 10.21 mg of C6H5K3O7.
Auxiliary Information Please check for your question in the FAQs before contacting USP.Chromatographic Column
USP32NF27 Page 3342
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.