... 0.53Electrical resistance of aqueous extract,Ωm≥224PH value of water suspension6.8-8.05Residue on the sieve(45um mesh),%(m ... value,g/100g≤207Whiteness,(compared with standard sample)100%8water dispersible power,%≥809Iron content,ppm≤50-Rutile NO.ItemIndex1TiO2 content,%(m ... , TCS≥19004Electrical resistance of aqueous extract,Ωm≥805PH value of water suspension6.5-8.56Residue on the sieve(45um mesh),%(m ...