猩红色无臭、几乎无味重质粉末。对光敏感。相对密度6.28。熔点259℃。沸点354℃。汽化热59.2 Kj/mol；熔化热18.90 kJ/mol；在130℃时由红色转变成黄色。蒸气压133.3 Pa(157.5℃)。遇三氟化氯、金属钾、金属钠剧烈反应。极微溶于水。易溶于碘化碱金属、硫代硫酸钠溶液。溶于乙醚、丙酮、氯仿、醋酸乙酯。

AR

HGT/T　3-1067-77
项目Item　　　                                                            分析纯　   化学纯
                                                                                        (AR)           (CP)
含量(HgI2)Assay,%                                                      ≥99.5        99.0
铁(Fe)Iron,%                                                                  ≤0.0005   0.001
可溶性汞盐(以Hg计)Souble mercurous salts,%       ≤0.01        0.03
澄清度试验Clarity                                                        合格            合格
灼烧残渣(以硫酸盐计)Ignition residue,%                  ≤0.02         0.1
ACS级
项目名称Item                                                                   ACS Grade
含量(干基，HgI2)Assay                                                     ≥99.0%
可溶性汞盐(以Hg计)Soluble mercury salts(as Hg)            ≤0.05%
碘酸钾溶解实验Solubility in potassium iodide solution     Passes test
亚汞盐(以Hg计)Mercurous mercury(as Hg)                         ≤0.1%