项 目                                              指标
外观                                               黑色粉末
pH （1%水溶液）                          8~9
磺酸钠基含量，%                          ≥10.0

水分含量，%                                   ≤10.0
水溶物含量，%                               ≥70.0
油溶物含量，%                                ≥25.0
高温高压滤失量，ml/30min           ≤25.0

表观粘度降低率，%                        ≥45.0

动切力降低率，%                             ≥50.0