high quality sodium metabisulfite
Na2S2O5:97.41%
To prevent damage, moisture, heat metamorphism
Both food & tech grade

high quality sodium metabisulfite
Molecular formula: Na2S2O5

Molecular weight :190.09

Solubility: soluble in water ,alcohol, and acetone and in acidic solution, 

Na2S2O5+ strong acid →SO2+salt, Na2S2O5+O2→Na2S2O6, Na2S2O5(1500°C)→SO2 and others .

1.Storage and transportation :  Should be stored in dry and cool place; avoid dampness and heat; maintain the integrity of packing. No mixing with oxidants and toxic articles. Shelf life is 6 months. Conveyance viechles should be clean with cover to prevent rain.

2.Appearance: white or light yellow power

3.Solubility:Soluble in water, water solution is acidity. Soluble in glycerin, slightly soluble in alcohol

4.Application:Used in bleach agent,mordant in dyeing,reductant,rubber solidifying agent, 

                        also used in organic synthesis, pharmaceutical and spices, etc

5.Properties: It is white or yellowish crystalline powder, relative density: 1.4; soluble in water(20°C 54g/100ml of water; 100°C 81.7g/100ml of water). Aqueous solution is acid; soluble in glycerin, slightly soluble in ethanol. Will be decomposed in humid conditions, and oxidized into sodium sulfate in open air; will release sulfur dioxide when contacting strong acids; will be decomposed at 150°C.

6.Use: In the manufacture of chloroform, solasulfone and benzaldehyde; as coagulator in rubber industry; as dechlorinating agent and cooking auxiliary in cotton fabrics; used in leather treatment in tanner industry; in the manufacture of hydroxycitronellal and hydroxylamine; as developer; as bleaching agent, preservative, anti-oxidant in food industry. As per GB2760-86, use level for fruit wine is 0.25g/kg max.; for wine, sugar, bamboo shoot is 0.45g/kg max.; Residues(SO2) in bamboo shoot and mushroom: 0.025g/kg max.; in fruit wine and sugar: 0.05g/kg; for others: 0.1g/kg max.