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Chemical name: 1-[(5-nitrofurfurylidene)amino] hydantoin
Molecular formula: C₈H₆N₄O₅
Molecular weight: 238.16
CAS: 67-20-9
Structural formula:

Specification:
A: In accordance with ChP 2020 edition
Characters: A yellow crystalline powder; odorless; the color darkens gradually in light.
pH: 5.5～7.0
Nitrofurazone: ≤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 /g
Total yeast and mold count: Not more than 10² cfu /g
B: Combin ation of specification in USP and EP
Appearance: 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.
 
Packing size: 25Kg/drum
Authentication code: Guo Yao Zhun Zi H37022205
Indications: For urinary tract infections resulted by sensitive bacteria, like pyelonephritis, urinary tract infection, cystitis and prostatitis.