硫氰酸铵,1762-95-4,Ammonium thiocyanate GB/T 660-92 项目Item 分析纯 化学纯 (AR) (CP) 含量(NH4SCN)Assay,% ≥ 98.5 98.0 pH(50g/L溶液,25℃) 4.5-6.0 4.5-6.0 澄清度试验Clarity 合格 合格 水不溶物Insoluble matter in water,% ≤ 0.005 0.01 灼烧残渣(以硫酸盐计)Ignition residue,% ≤ 0.01 0.02 氯化物(Cl)Chloride,% ≤ 0.005 0.01 硫化物(S)Sulfide ≤ 0.001 0.002 硫酸盐(SO4)Sulfate,% ≤ 0.005 0.02 铁(Fe)Iron,% ≤ 0.0001 0.0003 铜(Cu)Copper,% ≤ 0.0005 0.001 铅(Pb)Lead,% ≤ 0.0005 0.001 还原碘的物质(以I计)Substances reducing iodine,%≤ 0.05 0.1 ACS级 项目名称Item ACS Grade 含量Assay ≥97.5% 5%溶液25℃的pH值pH of a 5% solution at 25℃) 4.5-6.0 不溶物Insoluble matter ≤0.005% 灼烧残渣Residue after ignition ≤0.025% 氯化物(Cl)Chloride(Cl) ≤0.005% 硫酸盐(SO4)Sulfate ≤0.005% 重金属(以Pb计)Heavy metals(as Pb) ≤5ppm 铁(Fe)Iron(Fe) ≤0.0003% 还原碘的物质(以I计)Iodine-consuming substances ≤0.004meq/g 硫氰酸铵,1762-95-4,Ammonium thiocyanate 99.99%: 外观Appearance 白色至无色结晶 纯度Purity ≥99.99% Based On Trace Metals Analysis by ICP and Atomic Absorption ICP Assay Confirms Sulfur component 不溶物insolubles ≤0.005% 灼烧残渣Ignition residue ≤0.025% pH range 4.5 - 6.0 氯chloride (Cl-): ≤0.005% 硫酸根sulfate (SO42-): ≤0.005% 铁Fe: ≤3 ppm 重金属heavy metals: ≤5 ppm 痕量金属分析Trace Metal Analysis ≤200.0 ppm by ICP Atomic emission (Al、Ca、Fe、Mg) 痕量金属分析Trace Metal Analysis ≤200.0 ppm Atomic Absorption (Li、Na、K、Rb、Cs) |