硝酸钾

性状：无色透明结晶体。在潮湿空气中微潮解。密封于干燥处保存。
技术条件
含量(KNO3),%                                                                ≥99.0
pH（50g/L,25°C）                                                         5.0-8.0                                 
                              杂质最高含量（以%计）
澄清度试验,号                                                                 3
水不溶物                                                                         0.004
总氯量（以Cl计）                                                           0.003
碘酸盐（IO3）                                                               0.000    
硫酸盐（SO4）                                                               0.005                           
铵（NH4）                                                                     0.001   
磷酸盐（PO4）                                                              0.0005
钠（Na）                                                                       0.02
镁（Mg）                                                                      0.002
钙（Ca）                                                                        0.004
铁（Fe）                                                                        0.0005
重金属（以Pb计）                                                                       0.0005
危险：可加剧燃烧；氧化剂；怀疑损害生育力或胎儿；一次接触致器官损害；长期或反复接触可致器官损害。
安全措施：贮于阴凉，远离火种、火源；切忌与还原剂、酸类、易（可）燃物、含金属粉末共储混运；密封包装，切勿受潮，防止破损；误食，用水漱口，饮牛奶或蛋清