Aminocaproic Acid Tablets
» Aminocaproic Acid Tablets contain not less than 95.0 percent and not more than 105.0 percent of the labeled amount of aminocaproic acid (C6H13NO2).
Packaging and storage Preserve in tight containers.
USP Reference standards 11
Identification Triturate 2 Tablets with 10 mL of water, and filter into 100 mL of acetone. Swirl the mixture, and allow to stand for 15 minutes to complete crystallization. Filter through a medium-porosity, sintered-glass filter, and wash the crystals with 25 mL of acetone. Apply vacuum to remove the solvent, then dry at 105 for 30 minutes, and cool: the residue so obtained responds to the Identification test under Aminocaproic Acid.
Medium: water; 900 mL.
Apparatus 1: 100 rpm.
Time: 45 minutes.
pH 9.5 Borate buffer Dissolve 6.185 g of boric acid and 7.930 g of potassium chloride in about 1000 mL of water, add 60 mL of 1.0 N sodium hydroxide, and mix. Dilute with water to 2000 mL, mix, and add 1.0 N sodium hydroxide, if necessary, to adjust to a pH of 9.5 ± 0.1.
Standard preparation Dissolve an accurately weighed quantity of USP Aminocaproic Acid RS in water, and quantitatively dilute with water to obtain a solution having a known concentration of about 0.5 mg per mL.
Procedure Into three separate 50-mL volumetric flasks pipet (a) 1 mL of a filtered portion of the solution under test, (b) 1 mL of the Standard preparation, and (c) 1 mL of water to provide a blank. Add 20.0 mL of pH 9.5 Borate buffer and 3.0 mL of freshly prepared -naphthoquinone-4-sodium sulfonate solution (1 in 500) to each, swirl to mix, and place the 3 flasks in a water bath maintained at a temperature of 65 ± 5 for 45 minutes. Cool, dilute each with water to volume, and mix. Determine the amount of C6H13NO2 dissolved from absorbances, at the wavelength of maximum absorbance at about 460 nm, obtained from the test solution in comparison with those obtained from the Standard solution, using the blank to set the instrument.
Tolerances Not less than 75% (Q) of the labeled amount of C6H13NO2 is dissolved in 45 minutes.
Uniformity of dosage units 905: meet the requirements.
Assay Weigh and finely powder not fewer than 20 Tablets. Transfer an accurately weighed portion of the powder, equivalent to about 500 mg of aminocaproic acid, to a beaker, add about 100 mL of glacial acetic acid, heat gently to effect solution, and cool. Add 10 drops of a 1 in 500 solution of crystal violet in chlorobenzene, and titrate with 0.1 N perchloric acid in dioxane VS to a blue endpoint. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N perchloric acid is equivalent to 13.12 mg of aminocaproic acid (C6H13NO2).
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USP35NF30 Page 2169