Sodium Sulphite

Alternate Text

Molecular formula: Na2SO3

Molecular weight: 126.04

CAS No.: 7757-83-7

Property:White crystal powder. Specific gravity: 2.633. Melting point: 150℃. soluble in water, lightly soluble in alcohol. Water solution appears light alkalinity, it decomposition when heated, and has reduction role. It becomes sodium sulphate when oxidation in the air, it is easy to decompose when meet inorganic acid, it will release CO2gas .


It is mainly used for the industry of dyeing, medicine, leather making,paper making, chemical fiber, film, photographing, food, etc.

Packing:Net in 25KG/50KG Plastic Woven Bag.







92 Min

96 Min

97 Min

Fe %

0.002 Max

0.005 Max

0.003 Max

Water insoluble material %

0.1 Max

0.03 Max

0.02 Max


2% Max



Free alkali (by sodium carbonate) %


0.4 Max

0.10 Max




2.5 Max

NaCl %



0.10 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.