无水柠檬酸

性状描述: 白色颗粒，在潮湿空气中易吸潮，高温分解，易溶于水及醇；微溶于醚.
密度：1.1
熔点：153-159 °C

质量标准: Q/(HG)SJ 460-91
项目Item                                                  分析纯   化学纯
                                                           (AR)     (CP)
含量(C₆H₈O₇)Assay,%                                      ≥ 99.5    99.0
澄清度试验Clarity                                           合格    合格
水不溶物Insoluble matter in water,%                      ≤ 0.01    0.01
灼烧残渣(以硫酸盐计)Ignition residue,%                   ≤ 0.035   0.07
氯化物(Cl)Chloride,%                                     ≤ 0.0025  0.005
硫酸盐(SO₄)Sulfate,%　                                   ≤ 0.01    0.02
磷酸盐(PO₄)Phosphate,%                                   ≤ 0.0025  0.005
钙(Ca)Calcium,%                                          ≤ 0.01    0.02
铁(Fe)Iron,%                                             ≤ 0.001   0.002
重金属(以Pb计)Heavy metals,%                             ≤ 0.0005  0.001

储存条件: 密封保存。