light sodium carbonate Value Item StandardGrade GB210-2004( type)First grade Premium grade First grade Salable product Result Alkalinity(as Na2CO3) % ≥99.298.898.099.20Chloride (as NaCL) % ≤0.700.901.200.67Fe % ≤0.0040.0060.0100.001Water insoluble matter % ≤0.040.100.150.03Loss on ignition % ≤0.81.01.30.38