氢氧化钠

性状：白色均匀粒状或片状固体。易吸收空气中水分及二氧化碳
密封保存
严禁用于食品和饲料加工
技术条件
含量(NaOH),%                                                               ≥96.0

                              杂质最高含量（以%计）
澄清度试验                                                                    合格
氯化物（Cl）                                                                 0.005
硫酸盐（SO4）                                                              0.005
总氮量（N）                                                                  0.001                   
磷酸盐（PO4）                                                              0.001
硅酸盐（SIO2）                                                             0.01
碳酸盐                                                                           1.5
铝（Al）                                                                        0.002
钾（K）                                                                         0.05
钙（Ca）                                                                       0.01
铁（Fe）                                                                        0.001
重金属（以Pb计）                                                          0.003