1.Chemical and Physical Properties:

Products Name:Sodium Metabisulfite(SMBS)

Other Names:Sodium Pyrosulfite

Appearance:Powder

Molecular Form:Na2S2O5.

Molecular Weight:190.09

CAS NO.:7681-57-4.

EINECS NO.:231-673-0.

H.S Code:2832100000.

Application:Food and Industrial

White powder, a strong smell of sulfur dioxide, relative density is 1.4, easy to dissolve in water(20°C,54g/100ml water, 100°C,81.7g/100ml water) and glycerin, water solution. It has acidity, and its solubility will become large while raising the temperature and is less to dissolve in ethanol,Damp easily decomposed, when exposed in air, easily oxidized into sodium sulfate. And acid contact and the generated sulfur dioxide released corresponding salts. Heated to 150 °C decomposition.

 

2.Usage:

Sodium Metabisulfite (SMBS ) is used as Mordant of printing and dyeing; Dechlorination of textile after bleaching; Sulphonated agent and reducer of chemical industry and pharmacy; Bleach of paper pulp, bamboo and timber bleach of stap; Treatment agent of waste water;Rubber solidifying agent ,Perfume industry is served as hydrocarbon perfume aldehyde;The hide profession employ to do to molt dose and pliable dose and wearproof dose ;The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose and so on; sewage treatment. etc

3.Packing Details:

Sodium Metabisulfite (SMBS ) will be packed in N.W25kg or 50kg plastic woven bag within PE liner or Kraft paper bag within PE liner.

4.Storage:

Stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid raining.

Tests	Specification
Appearance	White free-flowing Crystal Powder
Purity (Na2S2O5)	98% min
Iron (Fe)	0.003% min
Heavy Metal (Pb)	5 ppm max
Arsenic (As)	1 ppm max
Water Insoluble	0.05% max
PH Value	4.0-4.6