Toluene diisocyanate manufacturer Knowledge Quality standards for non-national standard industrial sodium sulfide products of the People’s Republic of China_Kain Industrial Additives

Quality standards for non-national standard industrial sodium sulfide products of the People’s Republic of China_Kain Industrial Additives

Quality standards for non-national standard industrial sodium sulfide products of the People

The standard divides industrial sodium sulfide products into three categories:
Category 1 is ordinary sodium sulfide (commonly known as red alkali);
Category 2 is low-iron sodium sulfide (commonly known as yellow alkali);
Category 3 is high content of sodium sulfide

Ordinary sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  50 ~ 60 % Sodium Sulfite Na2SO3  5.0 % Iron Fe  0.15 %  (1500ppm) Water-insoluble matter content -  0.4 % Appearance - Brown-red flakes and granules

Low iron sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  50 ~ 60 % Sodium sulfite Na2SO 3  2.00 % Sodium thiosulfate Na2S2O3  2.00 % Iron Fe  0.015 %  (150ppm) Sodium carbonate Na2CO 3  2.00 % Water-insoluble matter content -  0.20 % Appearance - Yellow flakes and granules

Low iron sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  50 ~ 60 % Sodium sulfite Na2SO 3  2.00 % Sodium thiosulfate Na2S2O3  2.00 % Iron Fe  0.012 %  (120ppm) Sodium carbonate Na2CO 3  2.00 % Water-insoluble matter content -  0.20 % Appearance - Yellow flakes and granules

Low iron sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  50 ~ 60 % Sodium sulfite Na2SO 3  1.00  % Sodium thiosulfate Na2S2O3  2.00 % Iron Fe  0.01 %  (100ppm) Sodium carbonate Na2CO 3  2.00 % Water-insoluble matter content -  0.05 % Appearance - Yellow flakes and granules

Low iron sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  50 ~ 60 % Sodium sulfite Na2SO 3  2.00 % Sodium thiosulfate Na2S2O3  2.00 % Iron Fe  0.008  0.5 % Sodium carbonate Na2CO3  2.00 % Sodium sulfate Na2SO 4  1.00 % Water-insoluble matter content -  0.05 %  Density -  0.5 % Appearance - Light yellow particles

High content of sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  65-70 % Sodium carbonate Na2CO3  5.0 % Iron Fe  0.15   %  (1500ppm) Water-insoluble matter content -  0.40 % Appearance -  Brown-red solid

Liquid sodium sulfide (enterprise standard)

▼▲ Indicator name Indicator Sodium sulfide Na2S  30 % Iron Fe  0.15 % (1500ppm) Sodium carbonate Na2CO 3  3.0 % Water-insoluble matter content -  0.4 %

    Sodium sulfide Na2S  30 % Iron Fe  0.15 % (1500ppm) Sodium carbonate Na2CO 3  3.0 % Water-insoluble matter content -  0.4 %

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