... , ppm20 max.50 max.3 max.1 max.F , ppm500 max.500 max.75 max.75 max.Heavy metals,ppm20 max.30 max.15 max.15 max.P2O5, %40.0 min.18.0 min ... on ignition,% / /10.0 max.6.5max.Lead,ppm / /2 max.1max.Acid insolubles,% / / /0.05 max.Barium, / / /Pass testCarbonate / / /Pass testChloride, % / / /0.03 max. Physical CharacteristicWhite powder ...