AR  CP

项目ltem　　　　　　　　　　　　　　　　               分析纯　　　　化学纯
　　　　　　　　　　　　　　　　　　　　                (AR)                    (CP)
含量[Ca(OH)2]Assay,%                                                  ≥95.0                93.0
铁(Fe)lron,%                                                                  ≤0.01                0.02
镁盐及碱金属(以MgO计)Mafnesium
and alkali metals,%                                                         ≤0.5                  0.75
重金属(以Pb计)Heavy metals,%                                     ≤0.002              0.003
盐酸不溶物Insoluble in hydrochl-oride acid,%                 ≤0.05                 0.1
氨水中沉淀物Substances precipita-
ted from ammonia solution,%                                         ≤0.25                  0.5
氯化物(Cl)Chloride,%                                                      ≤0.01                   0.02
硫化合物(SO4)Sulfur compounds,%                               ≤0.2                     0.3

ACS级
项目名称Item                                                ACS Grade
含量[Ca(OH)2]Assay                                      ≥95%
含量[CaCO3]Assay                                        ≤3.0%
铁(Fe)Iron(Fe)                                                ≤0.05%
镁(Mg)Magnesium(Mg)                                   ≤0.5%
钾(K)Potassium(K)                                          ≤0.05%
钠(Na)Sodium(Na)                                          ≤0.05%
锶(Sr)Strontium(Sr)                                        ≤0.05%
稀盐酸不溶物Insoluble in dilute hydrochloric acid      ≤0.03%
氯化物(Cl)Chloride(Cl)                                     ≤0.03%
含硫化合物(以SO4计)Sulfur compounds         ≤0.1%
重金属(以Pb计)Heavy metals(as Pb)                ≤0.003%