无水硫酸钠

分子式：Na2SO4

分子量：142.04

含量不少于                                                   99.0%

pH值                                                            5.0~8.0

                         杂质最高含量（以%计）

澄清度试验                                                    合格

灼烧失重                                                        0.2

总氮量                                                           0.0005

钙                                                                  0.002

重金属                                                           0.0005

水不溶物                                                        0.005

氯化物                                                            0.001

磷酸盐                                                            0.001

铁                                                                   0.0005

钾                                                                   0.01