... ) Typical Chemical AnalysisHigh-class1st-gradeQualifiedTotal bases(as Na2CO3), % ≥99.2 98.898.0Chloride(as NaCl),% ≤ 0.70 0.901.2Fe % ≤ 0 ... sodium carbonate--denseItemHigh-class1st-gradeTotal alkali(as Na2CO3), % ≥ 99.1 98.8Chloride(as NaCl),% ≤ 0.70 0.90Fe % ≤ 0.004 0 ...