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            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
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