Silica - Sio2

We are offering silica - sio2. silica sio2 standard: fcc-1983 assay （sio2） ≧94.0% as ≤0.0003% heavy metals (as pb) ≤0.003% loss on drying ≤7.0% loss on ignition ≤8.5% sulifate (as na2so4) ≤5% screen residue （325 mesh） ≤5% ph volume 6.0---7.5 conclusion the specification conforms with fcc--1983