ParameterGradeStandard: GB210.1-2004 DenseLightTotal alkali (quality of fraction of Na2CO3 dry basis) % ≥ 99.298.899.298.8NaCl (quality fraction of NaCl dry basis) % ≤ 0.700.900.700.90Fe quality fraction (dry basis) % ≤ 0.0040.0060.0030.006Sulfate (quality fraction of SO4 dry basis ) % ≤ 0.03--0.030.03Water-fast substance in quality fraction % ≤ 0.030.100.030.10Loss on Ignition % ≤ 0.80.80.5%0.5%Accumulation density (g/ml) % ≥ 0.851.0----Particle size UP 180mm %≥ 75----Particle size UP1.18mm%≤ 2.0----