30% PAC      Al 2O3 Content,%  ≥   30   Basicity,%  40-90 PH Value  3.5-50 WaterInsolubleContent, ≤        0.3  As Content,% ≤  0.0002  Pb Content,% ≤  0.001  Cd Content,% ≤  0.0002  Hg Content,%≤  0.00001   Cr6+ Content,% ≤  0.0005