Oxalic acid diammonium salt
Molecular formula: (COONH4)2 H2O
Molecular weight: 142.12
Property:Colorless crystal, soluble in water and insoluble in alcohol
Uses:It is used as analytical reagent to test metal ion and for the production of safe explosive and pharmaceutical intermediate.
Executive standard: HG/T3453—1999
| Item | Top grade pure | analytically pure | chemically pure |
| content〔(NH4)2C2O4H2O〕/%≥ | 99.8 | 99.5 | 99.5 |
| PH range (50g/L,25℃) | 6.0-7.0 | 6.0-7.0 | 6.0-7.0 |
| clarity test | qualified | qualified | qualified |
| water insoluble/%≤ | 0.003 | 0.005 | 0.015 |
| chloride(Cl)/%≤ | 0.0005 | 0.001 | 0.002 |
| chloride(SO4)/%≤ | 0.005 | 0.01 | 0.02 |
| nitrate(NO3)/%≤ | 0.002 | ||
| sodium(Na)/%≤ | 0.001 | 0.002 | 0.005 |
| magnesium (Mg)/%≤ | 0.001 | 0.002 | 0.005 |
| potassium (K)/%≤ | 0.001 | 0.002 | 0.005 |
| potassium (Ca)/%≤ | 0.001 | 0.002 | 0.005 |
| Ferrum(Fe)/%≤ | 0.0002 | 0.0005 | 0.001 |
| heavy metal(in Pb)/%≤ | 0.0005 | 0.001 | 0.0015 |
