项目Item                                         优级纯      分析纯      化学纯
(GR)        (AR)        (CP)
含量(NH4F)Assay,%                                 ≥98.0      98.0        96.0
澄清度试验Clarity                                  合格       合格        合格
灼烧残渣(以硫酸盐计)Ignition residue,%            ≤0.005     0.02        0.05
游离酸(以NH4HF2计)Free acids,%                    ≤0.2       0.5         1.0
氯化物(Cl)Chloride,%                              ≤0.0005    0.005       0.01
硫酸盐(SO4)Sulfate,%　                            ≤0.005     0.01        0.01
氟硅酸盐(SiO3)Silicofluoride,%                    ≤0.04      0.15        0.30
铁(Fe)Iron,%                                      ≤0.0005    0.002       0.004
铜(Cu)Copper,%                                    ≤0.0005     --          --
重金属(以Pb计)Heavy metals,%                      ≤0.0005    0.001       0.001

项目名称Item                                      ACS Grade
含量Assay                                         ≥98.0%
不溶物Insoluble matter                            ≤0.005%
灼烧残渣Residue after ignition                    ≤0.01%
氯化物(Cl)Chloride(Cl)                            ≤0.001%
硫酸盐(SO4)Sulfate                                ≤0.005%
重金属(以Pb计)Heavy metals(as Pb)                 ≤5ppm
铁(Fe)Iron(Fe)                                    ≤5ppm

项目                                    电子级
(semiconductor grade)
含量 %                                 39.0-41.0
色度 Hazen                                10
pH(1%水溶液,25oC)                       6.5-7.0
氯离子 ppm                                2
硝酸盐 ppm                                3
磷酸盐 ppm                                0.2
硫酸盐 ppm                                1
锂 ppb                                    10
钠  ppb                                   10
镁  ppb                                   10
铝 ppb                                    10
钾 ppb                                    10
钙 ppb                                    10
铬  ppb                                   10
锰  ppb                                   10
铁 ppb                                    10
镍  ppb                                   10
钴  ppb                                   10
铜  ppb                                   10
锌  ppb                                   10
钼  ppb                                   10
镉 ppb                                    10
铅 ppb                                    10
银  ppb                                   10
颗粒　>=1.0um 个/ml                       25
颗粒　>=0.5um 个/ml                       100

99.99% metals basis：

外观Appearance                          白色结晶或颗粒等
X-射线衍射分析X-Ray Diffraction         Conforms to standard
纯度Purity                              ≥99.99% Based On Trace Metals Analysis
总金属杂质Total metallic impurities     100ppm by ICP Atomic emission
氟F                                     50.3% - 52.3%  (T)