67-20-9 Nitrofurantoin Nitrofurantoine
Product Name | Nitrofurantoin |
Specification | 99% |
Appearance |
Light yellow fine powder |
Items | Specification | Result |
Appearance | A yellow crystalline powder or yellow crystals | A yellow crystalline powder |
Identification | ||
A: Carry out the test protected from bright light. Use the solution prepared for the assay. Examined between 220nm and 400nm(2.2.25), the solution shows two absorption maxima, at 266nm and 367nm. The ration of the absorbance at the maximum at 367nm to that at the maximum at the maximum at 266nm is 1.36 to 1.42 |
Conforms | |
B: Dissolve about 10mg in 10ml of demethyformamide R. To 1ml of the solution add 0.1ml of 0.5M alcoholic potassium hydroxide. A brown colour develops | Conforms | |
Related substances | Not more than 1.0% | Conforms |
Loss on drying | Not more than 1.0% | 0.18% |
Sulphated ash | Not more than 0.1% | 0.06% |
Assay: | 98.0%~102.0% | 99.30% |
Residual Solvents | ||
Methanol | Not more than 3000ppm | Not detected |
Acetone | Not more than 5000ppm | Not detected |
CAS NO:4337-33-1
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