Sodium metabisulfite for Industrial use and for food use are large quantity supplied

Molecular Formula:Na2S2O5  
Molecule Weight:190.10

CAS No:7681-57-4
Appearance:White or light yellow crystalline powder

Specification:

 

ITEM	Industrial grade	Food grade
Assay:	96% min	96% min
SO2 content	65% min	65% min
Iron:	0.005% max	0.005% max
Heavy metals (as Pb)	--	0.002% max
Arsenic	--	0.0002% max
pH	4.0-4.6	4.0-4.6
Water insoluble:	0.05% max	0.05% max

Main uses: 

Food grade:
Bleach agent (e.g.candies, cake, bamboo shoots, etc);
Loose agent (e.g.bread, cracker etc);
Antiseptic and germicide (e.g.fruit juice, tinned food brews, the cereals food is defended storage etc);
Inhibitor and freshen agent (e.g.day lily, seafood, fruit and vegetable etc)

Industrial grade:

Mordant of printing and dyeing;
Dechlorinate of textile after bleaching;
Sulphonated agent and reducer of chemical industry and pharmacy;
Bleach of paper pulp, bamboo and timber bleach of stapk; 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.

Packaging:in polythene plastic bag with a polypropylene overbag, paper-plastic composite bag, kraft bag, etc.