无色细小结晶或白色颗粒。185 °C (dec.)(lit.) 沸点  100 °C(lit.),密度  1.22 g/mL at 20 °C能溶于水，微溶于醇熔点   

项目Item                                                                 分析纯       化学纯
                                                                                  (AR)         (CP)
含量(C6H4O7N2)Assay,%                                    ≥99.0       98.0
澄清度试验Clarity                                                     合格         合格
水不溶物Insoluble matter in water,%                ≤0.005      0.01
灼烧残渣(以硫酸盐计)Ignition residue,%          ≤0.03       0.06
氯化物(Cl)Chloride,%                                            ≤0.001      0.002
硫化合物(以SO4计)Sulfur compounds,%          ≤0.005      0.01
磷化合物(以PO4计)Phosphours compounds,%            ≤0.002      0.005
草酸盐(C2O4)Oxalate                                        合格        --
钙(Ca)Calcium,%                                              ≤0.005      0.02
铁(Fe)Iron,%                                                        ≤0.0005     0.002
重金属(以Pb计)Heavy metals,%                      ≤0.0005     0.001

用作分析试剂和缓冲剂
密封保存