氟氢化铵/1341-49-7

白色或无色透明斜方晶系结晶，商品呈片状，略带酸味。 微溶于醇，极易溶于冷水，在热水中分解。水溶解呈强酸性。 熔点 125 °C(lit.) 沸点 230 °C 密度 1,5 g/cm3 闪点 238°C 
质量标准
   

项目Item                                                             分析纯      化学纯
                                                                             (AR)        (CP)
含量(NH₄HF₂)Assay,%                                    ≥ 98.5       97.00
灼烧残渣(以硫酸盐计)Ignition residue,%     ≤ 0.01       0.05
氯化物(Cl)Chloride,%                                     ≤ 0.001      0.005
硫酸盐(SO₄)Sulfate,%                                     ≤ 0.005      0.01 
氟硅酸盐(以SiF₆计)Fluosilicate,%                 ≤ 0.2        0.5
铁(Fe)Iron,%                                                       ≤ 0.001      0.005
重金属(以Pb计)Heavy metals,%                    ≤ 0.002      0.005


99.999% metals basis:


外观Appearance                                             White Crystals 
X-射线衍射分析X-Ray Diffraction                 Conforms to Structure
纯度Purity                                                      ≥99.999% Based on Trace Metals Impurities
F(Gravimetric Analysis with Lead Acetate)      64.9 - 68.3 % 
总痕量金属杂质total metallic impurities     ≤20ppm by ICP Atomic emission