Index nameUsed in toothpaste HG3257-1990Medical grade Food additive GB1889-92CP 2000 USP-23Appearance-------White powderWhite powderWhite powderStabilizerPass the experiment---------------------PH value(20%)7.6-8.3---------------------Loss on ignition (800)24.5-26.524.5-26.524.5-26.524.5-26.5CarbonatePass the experimentPass the experimentPass the experiment-------Fineness (pass 45m test sieve)≥%97.0---------------------Sulfide Pass the experiment---------------------Chloride(Cl)≤%0.030.050.25-------Water-absorbing capacity(ml/20g)5.0-6.5---------------------Content(based on CaO)%32.0-33.098.0-105.0 (based on CaHPO4.2H2O)98.0-105.0 (based onCaHPO4.2H2O)98.0-103.0 (based onCaHPO4.2H2O)Arsenic(As)≤%0.00080.0010.00030.0002Heavy metal(based on Pb)≤%0.0030.0030.0030.001Fluoride(F)≤%0.0050.0150.0050.005Whiteness≥%95---------------------Barium salt-------Pass the experimentPass the experiment-------Sulfate(SO4)≤%-------0.20.5-------Insoluble substance in acid≤%-------0.10.20.05Total count of bacteria colonies/g≤-------1000--------------The number of mould/g ≤-------100--------------Colibacillus-------Can not be inspected--------------