Nitrofurantoin

Chemical name: 1-[(5-nitrofurfurylidene)amino] hydantoinMolecular formula: C₈H₆N₄O₅Molecular weight: 238.16CAS: 67-20-9Structural formula:

Specification:A: In accordance with ChP 2020 editionCharacters: A yellow crystalline powder; odorless; the color darkens gradually in light.pH: 5.5～7.0Nitrofurazone: ≤0.01%Loss on drying: ≤0.5%Residue on ignition: ≤0.1%Assay: 98.0%～102.0%Total aerobic microbial count: Not more than 10³ cfu /gTotal yeast and mold count: Not more than 10² cfu /gB: Combin ation of specification in USP and EPAppearance: A yellow crystalline powder or yellow crystals.Related Substances(EP): ≤1.0%Loss on drying（EP）: ≤1.0%Sulfated ash（EP）: ≤0.1%Nitrofurazone（USP）: ≤0.01%5-Nitrofurfural Diacetate（USP）: ≤0.15%Any individual unspecified impurity: ≤0.10%Total impurities: ≤0.5%Assay（EP）: 98.0%～102.0% of C₈H₆N₄O₅ on the dried substance.