质量标准:项目Item                                                 分析纯    化学纯
                                                          (AR)      (CP)
含量(C8H6O4)Assay,%                                    ≥ 99。5%     99.0
灼烧残渣(以硫酸盐计)Ignition residue,%               ≤ 0.02      0.05
氯化合物(Cl)Chlorine compounds,%                       ≤ 0.002     0.01
硫化合物(以SO4计)Sulfur compounds                      ≤ 0.02      0.005
铁(Fe)Iron,%                                           ≤ 0.0005    0.001
重金属(以Pb计)Heavy metals,%                           ≤ 0.001     0.005
ACS级
项目名称Item                                          ACS Grade
含量[(C6H4(COOH2)]Assay                                 ≥99.5%
水不溶物Insoluble matter                               ≤0.05%
灼烧残渣Residue after ignition                         ≤0.02%
氯化物(Cl)Chloride(Cl)                                 ≤0.001%
硝酸盐(NO3)Nitrate                                     ≤0.005%
硫酸盐(SO4)Sulfate                                     ≤0.005%
重金属(以Pb计)Heavy metals(as Pb)                      ≤0.001%
铁(Fe)Iron(Fe)                                         ≤0.001%
水分(H2O)Water                                         ≤0.05%