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Potassium iodide

Cas:
7681-11-0
Molecular Structure:
MDL:
MFCD00011405
Molecular Formula:
KI
Molecular Weight:
166.00
Alias:
灰碘
Product order:
Name Specifications Packing Price Delivery
Potassium iodide CP 500g RMB 528
Potassium iodide AR 100g RMB 165
Potassium iodide AR 500g  RMB 649
Potassium iodide GR 100g RMB 187
Potassium iodide GR 500g RMB 759
Potassium iodide 4N,99.99% 10g RMB 105.6
Potassium iodide 4N,99.99% 50g RMB 435.6
Potassium iodide ACS 100g RMB 184.8
Potassium iodide ACS 500g RMB 638
Character:
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、丙酮和甘油,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。近似致死量(大鼠,静脉)285mg/kg。
密度:3.12
熔点:680℃
沸点:1420℃
   在潮湿空气中微有吸湿性,久置析出游离碘而变成黄色,并能形成微量碘酸盐。光及潮湿能加速分解。1g溶于0.7ml水、0.5ml沸水、22ml乙醇、 8ml沸乙醇、51ml无水乙醇、8ml甲醇、7.5ml丙酮、2ml甘油、约2.5ml乙二醇。其水溶液也会氧化而渐变黄色,可加少量碱防止。
Quality Standard:
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℃)pH of water sol-
ution                                  6.0-8.0      6.0-8.0    6.0-8.0
澄清度试验Clarity                      合格         合格       合格
水不溶物lnsoluble matter in water,%  ≤0.005        0.01       0.02
氯化物及溴化物(以Cl计)Chloride and
bromide,%                            ≤0.01         0.02       0.05
碘酸盐及碘(以IO3计)lodate and iodine  ≤0.0003       0.002      0.005
硫酸盐(SO4)Sulfate,%                 ≤0.002        0.005      0.01
磷酸盐(PO4)Phosphate,%               ≤0.001        0.002      --
总氮量(N)Total nitrogen,%            ≤0.001        0.002      0.002
钠(Na)Sodium,%                       ≤0.05         0.1        --
镁(Mg)Magnesium,%                    ≤0.001        0.002      0.005
钙(Ca)Calcium,%                      ≤0.001        0.002      0.005
铁(Fe)Iron ,%                        ≤0.0001       0.0003     0.0005
钡(Ba)Barium,%                       ≤0.001        0.002      0.004
重金属(以Pb计)Heavy metals,%         ≤0.0002       0.0005     0.001
砷(As)Arsenic,%                      ≤0.00001      0.00002    --
还原性物质Reducing substances          合格         合格        --

ACS级
项目名称                            ACS Grade
含量(KI)Assay                        ≥99.0%
25℃时5%溶液的pH值
pH of a 5% solution at 25℃           6.0-9.2
水不溶物Insoluble matter             ≤0.005%
干燥失重Loss on drying               ≤0.2%
氯化物及氯酸盐(以Cl计)
Chlorine and bromide                 ≤0.01%
碘酸盐(IO3)Iodidi                    ≤0.0003%
磷酸盐(PO4)Phosphate                 ≤0.001%
硫酸盐(SO4)Sulfate                   ≤0.005%
钡(Ba)Barium                         ≤0.002%
重金属(以Pb计)Heavy metals           ≤5ppm
铁(Fe)Iron                           ≤0.0003%
钙(Ca)Calcium                        ≤0.002%
镁(Mg)Magnesium                      ≤0.001%
钠(Na)Sodium                         ≤0.005%

Storage:
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。
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