Sodium Metabisulfite

Alternate Text

Molecular formula: Na2S2O5

Molecular weight: 190.12

CAS No.: 7681-57-4

Property:White or light-yellow crystalline powder, smell of SO2. No other smell when dried. Specific gravity is 1.4. It's soluble in glycerine, it's soluble slightly in alcohol.


  Food Grade: Mainly used as bleaching agent, bulking agent, antioxidant preservatives in food processing.


Tech Grade: Mainly used for producing medicine iodoform, vanillin photographic fixative, rubber solidifying agent, decolorizing agent of bleached fiber, leather treatment of leather making industry, etc. 

Packing:Net in 25KG plastic woven bag.



Food Grade

Tech Grade

Sodium Metabisulfite (as SO2)

65% Min

65% Min


0.003% Max

0.005% Max

Insoluble matter in water

0.05% Max

0.05% Max




Heavy metal(as Pb)

0.002% Max



0.0002% Max




Is a specialized manufacturing and operating chemical enterprise Our company own variety of export products which are widely used in chemical, pharmaceuticals, textile printing & dyeing, leather processing, fertilizer, water treatment, construction industry, food &feed additives and other areas. Oxalic acid, formic acid, sodium formate, calcium formate, sodium sulphide, series of humic acid, sodium hydrosulphide, ammonium chloride, sodium thiosulfate, and calcium nitrite are partial strong products. Among them, STPP occupy largest export volume and export to more than 20 countries and regions in America , Asia, Africa and other continents, winning customers praise with its superior quality , favorable price and excellent service. For over 10 years, stick to business philosophy of" you should give your customer what they really need not what you think they need ", Verdi has built long term & stable trade relationship with more than 45 countries and regions in the world. sincerely hope to cooperate with more clients in the world and seek common developments.