性状  白色立方晶系结晶体或粉末。无嗅，味咸苦。易溶于水、乙醇、丙酮、甘油、液氨、液体二氧化硫，水溶液呈微碱性。有潮解性，湿空气中吸水而凝块。与空气接触逐渐分解而析出碘，渐呈棕色。
密度：3.67
熔点：651℃
沸点：1304℃
   
备注:  以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。
质量标准  
   Q/(HG)SJ 032-91
项目Item                                分析纯     化学纯
                                         (AR)       (CP)
含量(NaI)Assay,%                       ≥99.5       99.0
水不溶物Insiluble matter in water,%    ≤0.005      0.005
氯化物(Cl)Chloride,%                   ≤0.03       0.1
碘酸盐(IO3)Iodate,%                    ≤0.005       0.01
硫酸盐(SO4)Sulfate ,%                  ≤0.005       0.01
总氮量(N)Total nitrogen,%              ≤0.001       0.005
镁(Mg)Magnesium,%                      ≤0.005       0.001
钙(Ca)Calcium,%                        ≤0.001       0.005
铁(Fe)Iron,%                           ≤0.0002      0.0005
钡(Ba)Barium,%                         ≤0.00005     0.0001
重金属(以Pb计)Heavy metals,%           ≤0.0005      0.001

ACS级
项目名称　                                          ACS Grade
含量Assay                                           ≥99.5%
"pH(5%,25.0℃)"pH of a 5% solution at 25.0℃         6.0-9.0
水不溶物Insoluble matter                            ≤0.01%
氯化物和溴化物(以Cl计)Chloride 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                                          ≤5ppm
钙(Ca)Calcium                                       ≤0.002%
镁(Mg)Magnesium                                     ≤0.001%
钾(K)Potassium                                      ≤0.01%

品级Grade                                       药典级 
                                           (Ph. Eur., BP, USP)
含量assay                                      99-100.5% (calc. to the dried substance)
碱反应杂质alkalic reac. Impurities,            complies
硫代硫酸钡barium and thiosulfate,              complies
有机挥发物organic volatile impurities(GC),     complies 
残留溶剂residual solvents,                     in accordance
重金属heavy metals (as Pb)                     ≤0.0005% 
总氮total nitrogen (N)                         ≤0.003% 
硫代物thiosulfate (S2O3)                       ≤0.005% 
游离碱free alkali (as NaOH)                    ≤0.02% 
水分water (Karl Fischer)                       ≤2%
干燥损失loss on drying, 105 °C                ≤2%
溴、氯bromide, chloride (as Cl-):              ≤300 ppm
碘酸钾iodate (IO3-):                           ≤2 ppm
硫酸根sulfate (SO42-):                         ≤100 ppm
Fe:                                            ≤5 ppm
K:                                             ≤500 ppm
溶解性suitability for appearance of solution   complies

99.99% metals basis:

外观Appearance                          white Powder/Crystals
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
纯度Purity                              ≥99.99% Based on Trace Metals Impurities of ICP
ICP Assay                               Confirms Na component
碘I(titrationwith silver nitrate)       83.0%-86.4%
痕量金属分析total metallic impurities   ≤100ppm by ICP Atomic emission

99.999% metals basis:

外观Appearance                          white Powder/Crystals
X-射线衍射分析X-Ray Diffraction         Conforms to Structure
纯度Purity                              ≥99.999% Based on Trace Metals Impurities of ICP
ICP Assay                               Confirms Na component
碘I(titrationwith silver nitrate)       83.5%-86.5%
痕量金属分析total metallic impurities   ≤20ppm by ICP Atomic emission
(K、Cs、Cu、Al、Tl、Mn、Se)
贮存  密封避光保存。
用途  化学工业用作制备无机和有机碘化物的重要原料，也用作碘的助溶剂和用于配制碘乳剂。医药工业用于生产祛痰剂和利尿剂等药物。感光工业用作胶片的感光剂，分析化学中用作点滴分析及其他分析试剂。化学反应中用作氧化剂。
    当温度低于65．6℃，碘化钠在水溶液中形成含水数目不定的各种水合物。室温下由溶液析出二水物，为无色棱形晶体，-13．5～31．5℃内可析出五水物。与二氧化硫作用，生成相应的稳定化合物。有还原性，可被氧化别氧化，游离出碘。
联合国编号  
Risk：  R36/38-
Safety :  S26 -
Hazard :  Xi -