Liquid specifications: Item Specification IL-IT IL-DT IL-CT Ⅰ Ⅱ Ⅰ Ⅱ Ⅰ S F Q S F Q S F Q F Q S F Q NaOH %≥ 45.0 30.0 42.0 30.0 45.0 42.0 Na2CO3 %≤ 0.2 0.4 0.6 0.1 0.2 0.4 0.3 0.4 0.6 0.3 0.5 1.0 1.2 1.6 NaCl %≤ 0.02 0.03 0.05 0.005 0.008 0.01 1.6 1.8 2.0 4.6 5.0 0.7 0.8 1.0 Fe2CO3 %≤ 0.002 0.003 0.005 0.0006 0.0008 0.001 0.003 0.006 0.01 0.005 0.008 0.01 0.02 0.03