Ferric Ammonium Citrate for Oral Solution
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This article is compiled based on the United States Pharmacopeia (USP) – 2025 Edition
Issued and maintained by the United States Pharmacopeial Convention (USP)
Ferric Ammonium Citrate for Oral Solution contains Ferric Ammonium Citrate and an effervescent mixture of a suitable organic acid and an alkali metal bicarbonate. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of Fe. It may contain one or more suitable flavors, colors, or stabilizing agents.
Packaging and storage—Preserve in tight, light-resistant containers, and store in a cool place.
Identication—A 6-g portion dissolves in 600 mL of water with effervescence. The collected gas meets the requirements of the test for Bicarbonate 〈191〉, and the resulting solution meets the requirements of the tests for Iron 〈191〉 and for Citrate 〈191〉.
Uniformity of dosage units 〈905〉—
for powder packaged in single-unit containers: meets the requirements.
Deliverable volume 〈698〉—
for powder packaged in multiple-unit containers: meets the requirements.
Assay—Transfer about 6 g of Ferric Ammonium Citrate for Oral Solution, accurately weighed, to a 250-mL conical ask, and dissolve in 100 mL of water. Allow the gas to escape, add 5 mL of hydrochloric acid and 4 g of potassium iodide, insert the stopper, and allow to stand protected from light for 15 minutes. Add 25 mL of water, and titrate the liberated iodine with 0.1 N sodium thiosulfate VS, using starch TS as the indicator. Perform a blank determination, and make any necessary correction. Each mL of 0.1 N sodium thiosulfate is equivalent to 5.585 mg of Fe.
