... indexGB1889-2004FCC-IVAppearanceWhite powderWhite powderContent(As CaHPO4·2 H2O),%98.0~103.097.0~105.0Loss on ignition,%2 4.5~26.52 ... 4.5~26.5Heavy metal(As Pb),%≤0.001≤0.0015Pb, %≤0.0005≤0 ... .0002Arsenic (As),%≤0.0002≤0.0003Fluorides(As F),%≤0.005≤0.005Acid-insoluble Substances,%≤0.05---USES:In ...