硫酸钙（Caso4）质量分数，以干基记%                       ≥99.2

铅（Pb）质量分数%                                         ≤0.0002

砷（As）质量分数%                                         ≤0.0002

氟化物（以F记）质量分数%                                 ≤0.003

干燥减量质量分数%                                         19.6

硒（Se）质量分数%                                         ≤0.003

白度                                                      ≥92

性状                                                      白色粉末

细度                                                      325目