无水碳酸钠

性状：白色粉末。暴露于空气中逐渐吸水成为一水合物。遇酸分解。密封于干燥处保存。
（分析纯）AR
注意：低毒、具腐蚀性。
安全措施：密闭包装，并贮于干燥通风处。与酸类、金属粉末、卤数分储分运。注意个体防护，严禁身体直接接触。皮肤（眼镜）接触，用流动清水冲洗。误食，用水漱口，饮牛奶或蛋清。
技术条件
含量(Na2CO3),%                                                           ≥99.8
                              杂质最高含量（以%计）
澄清度试验，号                                                              3
水不溶物                                                                        0.01
干燥失量（300°C）                                                        1.0
氯化物（Cl）                                                                 0.002
硫化合物（SO4）                                                          0.005
总氮量（N）                                                                  0.001                   
磷酸盐及硅酸盐（SIO4）                                               0.006
镁（Mg）                                                                      0.002
铝（Al）                                                                        0.003
钾（K）                                                                         0.005
钙（Ca）                                                                       0.01
铁（Fe）                                                                        0.0005
重金属（以Pb计）                                                          0.0005