Quality Standard: Q/(HG)SJ 328-91
項(xiàng)目Item 分析純 化學(xué)純
(AR) (CP)
含量(NH4SO3NH2)Assay,% ≥ 99.0 99.0
熔點(diǎn)范圍Melting range,℃ 131.0-133.0 130.0-133.0
水不溶物Insoluble matter in water,% ≤ 0.01 0.02
灼燒殘?jiān)?以硫酸鹽計(jì))Ignition residue,% ≤ 0.01 0.03
氯化物(Cl)Chloride,% ≤ 0.002 0.004
硝酸鹽(NO3)Nitrate,% ≤ 0.002 0.004
硫酸鹽(SO4)Sulfate,% ≤ 0.02 0.05
鐵(Fe)Iron,% ≤ 0.0005 0.0005
重金屬(以Pb計(jì))Heavy metals,% ≤ 0.0005 0.0005
ACS級(jí)
項(xiàng)目名稱Item ACS Grade
含量(NH4OSO2NH2)Assay ≥98.0%
熔點(diǎn)Melting point 131.0℃-133.0℃
水不溶物Insoluble matter ≤0.02%
灼燒殘?jiān)黂esidue after ignition ≤0.1%
重金屬(以Pb計(jì))Heavy metals(as Pb) ≤5ppm