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SODIUM HYDROSULPHITE
COMMODITY SODIUM HYDROSULPHITE
MOLECULAR FORMULA Na2S2O5
Na2S2O5 85% MIN.
Fe 20 ppm
Zinc Zn 1 ppm
Other heavy metal with Pb to calculate 1 ppm
Matter which does not dissolve in water 0.05%
Storage time limit 12 Months.