质量标准: Q/(HG)SJ 328-91
项目Item 分析纯 化学纯
(AR) (CP)
含量(NH4SO3NH2)Assay,% ≥ 99.0 99.0
熔点范围Melting range,℃ 131.0-133.0 130.0-133.0
水不溶物Insoluble matter in water,% ≤ 0.01 0.02
灼烧残渣(以硫酸盐计)Ignition residue,% ≤ 0.01 0.03
氯化物(Cl)Chloride,% ≤ 0.002 0.004
硝酸盐(NO3)Nitrate,% ≤ 0.002 0.004
硫酸盐(SO4)Sulfate,% ≤ 0.02 0.05
铁(Fe)Iron,% ≤ 0.0005 0.0005
重金属(以Pb计)Heavy metals,% ≤ 0.0005 0.0005
ACS级
项目名称Item ACS Grade
含量(NH4OSO2NH2)Assay ≥98.0%
熔点Melting point 131.0℃-133.0℃
水不溶物Insoluble matter ≤0.02%
灼烧残渣Residue after ignition ≤0.1%
重金属(以Pb计)Heavy metals(as Pb) ≤5ppm