Alternate Text

Molecular formula: NaHSO2.CH2O.2H2O

Molecular weight: 154.12

CAS No.: -

Property:White crystal powder, has the strong reducibility under high temperature, Soluble in water, slightly soluble in alcohol, decomposition in diluted acid . Aqueous solution is stable under 50 ℃, decompositionobviouslyabove 60 ℃


Its mainly used as a discharging agent in printing and dyeing industry and as an active agent for producing styrene-butadiene rubber and synthetic resin. Besides, it is also used as a decolorant and bleaching agent for some organic compounds. It is also used to bleach sugar juice. caramel, etc. In food industry. It may be substituted for the sodium hydrosulfite in some special conditions.

Packing:Net in 25KG/50KG Plastic Barrels.


Names of index


Content of CH2O.NaHSO2%

98 Min

Water insoluble

0.4 Max

state of solution

Water solution clear or microturbid


No presence of black color is allowed


No smell or a little smell of leek

Fe %

0.01 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.