Furosemide is a diuretic which is an anthranilic acid derivative. Chemically it is 4‑chloro-N-furfuryl-5-sulfamoylanthranilic acid.
Furosemide is a white to slightly-yellow crystalline powder. It is practically insoluble in water, sparingly soluble in alcohol, freely soluble in dilute alkali solutions and insoluble in dilute acids. It has the following structural formula:
Molecular formula: C12H11CI N2O5S
Molecular weight: 330.75
Furosemide Injection, USP is a sterile solution intended for intramuscular or intravenous administration. Each mL contains furosemide 10 mg and sodium chloride sufficient to render solution isotonic in water for injection. Contains sodium hydroxide and may contain hydrochloric acid for pH adjustment. pH is 8.0 to 9.3.
Contains no preservative.