Assay(as Na5P3O10) %------------94.0min P2O5%----------------------------------57.0min Water Insoluable%-------------------0.15max Iron(Fe)%-------------------------------0.01max PH(1% water solution) %-----------9.2-10.0 Through 16 mesh sieve%-----------95min Through 35 mesh sieve%-----------90min Through 100 mesh sieve%----------40min Whiteness%-----------------------------90min