碘化钾Potassium iodideCas号【7681-11-0 】分子式KI分子量166.00别名灰碘性状无色结晶或白色粉末。微有潮解性。久置或见光析出碘即变黄。溶于水、乙醇、和甘油，不溶于醚、防潮、避光保存。其水溶液呈中性或微碱性，能溶解碘。密度:3.12熔点:680℃沸点:1420℃质量标准GB/T1272-88项目ltem优级纯分析纯化学纯(GR)(AR)(CP)含量(Kl)Assay,%≥99.5%98.5%98.0%pH(50g/L溶液，25℃)pHofwatersol-ution6.0-8.06.0-8.06.0-8.0澄清度试验Clarity合格合格合格水不溶物lnsolublematterinwater,%≤0.0050.010.02氯化物及溴化物(以Cl计)Chlorideandbromide,%≤0.010.020.05盐及碘(以IO3计)lodateandiodine≤0.00030.0020.005盐(SO4)Sulfate,%≤0.0020.0050.01磷酸盐(PO4)Phosphate,%≤0.0010.002--总氮量(N)Totalnitrogen,%≤0.0010.0020.002钠(Na)Sodium,%≤0.050.1--镁(Mg)Magnesium,%≤0.0010.0020.005钙(Ca)Calcium,%≤0.0010.0020.005铁(Fe)Iron,%≤0.00010.00030.0005钡(Ba)Barium,%≤0.0010.0020.004重金属(以Pb计)Heavyls,%≤0.00020.00050.001砷(As)Arsenic,%≤0.000010.00002--还原性物质Reducingsubstances合格合格--ACS级项目名称　ACSGrade含量(KI)Assay≥99.0%25℃时5%溶液的pH值pHofa5%solutionat25℃6.0-9.2水不溶物Insolublematter≤0.005%干燥失重Lossondrying≤0.2%氯化物及氯酸盐(以Cl计)Chlorineandbromide≤0.01%盐(IO3)Iodidi≤0.0003%磷酸盐(PO4)Phosphate≤0.001%盐(SO4)Sulfate≤0.005%钡(Ba)Barium≤0.002%重金属(以Pb计)Heavyls≤5ppm铁(Fe)Iron≤0.0003%钙(Ca)Calcium≤0.002%镁(Mg)Magnesium≤0.001%钠(Na)Sodium≤0.005%≥99.99%lsbasis:外观Appearance白色结晶或粉末纯度Purity≥99.99%BasedonTraceMetalsImpuritiesofICPI76.0-77.0%(TitrationbyAgNO3)ICP:ConfirmsPotassiumComponentConfirmed痕量金属分析TraceMetalAnalysis≤100ppmbyICPAtomicemission(Na、Rb、Cs、Th、Ca、Sr、U、Cd、Hg、Nb、In、Tl、Cr、Mn、Bi、Fe、Se)≥99.999%lsbasis:外观Appearance白色结晶或粉末纯度Purity≥99.999%BasedonTraceMetalsImpuritiesofICPI76.0-77.0%(TitrationbyAgNO3)ICP:ConfirmsPotassiumComponentConfirmed痕量金属分析totalimpurities≤20ppmbyICPAtomicemission(Al、As、Ba、Ca、Cd、Ce、Co、Cr、Cu、Eu、Fe、Hg、La、Mg、Mn、Na、Ni、Pb、Sc、Sm、Sr、Tl、Y）贮存密封避光保存。易吸潮用途容量分析碘量法的常用试剂。单倍体育种中配制伯莱德斯、改良怀特、MS和RM等培养基。粪便检验等。照相。制药。