Chemical name:1-(5-nitrofurfurylideneamino)hydantoin
Structural formula:

Molecular formula:C₈H₆N₄O₅
Molecular weight:238.16
Property:It is yellow crystal powder,odorless ,bitter taste,it will turn dark in the light,it can absorb moisture and become nitrofurantoin.
Specification:
   A:Accord with China Pharmacopoeia 2005 edition
   Appearance:yello crystal powder
   Assay:98.0~102.0%
   Loss on drying:Not more than 1.0%
   Reidue on ignition:Not more than 0.1%
   Acidity:5.5~7.0
   B:Accord with British Pharmacopoeia (2005) edition
   Appearance:bright yellow crystal powder
   Assay:98.0~102.0%
   Loss on drying:Not more than 1.0%
   Sulphated ash:Not more than 0.1%
   C:Accord with Europe Pharmacopoeia III edition
   Appearance:A yellow crystalline powder of crystals,odourless or almost odourless Very slightly soluble in water and ethanol(96%);soluble in dimetylformamide.
   Assay:98.0~102.0%
   Loss on drying:Not more than 1.0%
   Sulphated ash:Not more than 0.1%
   D:Accord with United States Pharmacopoeia 29 edition
   Appearance:A yellow crystalline powder.
   Assay:98.0~102.0%
   Water:Not more than 1.0%
   Limit of Nitrofurfural Diacetate:Not more than 0.1%
   Limit of Nitrofurazone(FDA):Not more than 0.01%
   Use: It is a antibacterial.
   Registered number of approval:National drug standard H37022205

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