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SPECIFICATION | STANDARD | ||
Food Grade | Industry Grade | ||
NA2S2O5 | 97% MIN | 97%MIN | |
SO2 | 65% MIN | 65%MIN | |
Fe | 0.002% MAX | 0.003%MAX | |
Water insoluble matter | 0.03% MAX | 0.03%MAX | |
HEAVY METALS AS Pb | 0.0005% MAX | 0.0005%MAX | |
ARSENIC | 0.0001% MAX | 0.0001%MAX | |
SE | 0.0005% MAX | ||
PH VALUE | 4-4.5 | 4-4.5 | |









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