Item | Standard | Result | Conclusion |
NaHSO2.CH2O.2H2O | ≥98.0% | 99.2% | Pass |
Solution | Clear or shight turbid | Slight turbid | Pass |
No black | No black | Pass | |
Appearance | White powder | White powder | Pass |
Cu content | / | / | / |
Mn content | / | / | / |
Solubility in benzene | Insoluble | Insoluble | Pass |
Conclusion | First class product |