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26 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