焦硫酸钾

性状：白色块状结晶。易潮解。水溶液呈强酸性。密封于干燥处保存。
（分析纯）AR
安全措施：密封保存，并贮于干燥通风处。应与食用化学品分开存放。大量使用应穿适当的防护服。误食，饮足量温水，催吐，就医。皮肤（眼镜）接触：用流动清水或生理盐水冲洗。如有不适感，就医。
技术条件
含量(K2S2O7),%                                                             ≥98.0
pH值（50g/L,25°C）                                                      6.3~8.5                             
                              杂质最高含量（以%计）
澄清度试验                                                                     合格
水不溶物                                                                        0.01
氯化物（Cl）                                                                  0.001
磷酸盐（PO4）                                                              0.001                          
钙及镁（以Ca计）                                                          0.005
铁（Fe）                                                                        0.001
砷（As）                                                                       0.0003
重金属（以Pb计）                                                         0.0005