SODIUM PYROSULFITE/SODIUM METABISULFITE
1. Detail description of sodium metabisulfite 65%min
CAS NO.: 7681-57-4
Apperance: white powder
2. Specification of sodium metabisulfite 65%min
|Index||tech grade||food grade|
3. Application of sodium metabisulfite 65%min
1):Bleaching agent for textile fibres, paper pulps
2):Colors stripper and dechlorination
3):Preparation of Indigo Vat Dye
4):solubilizing and acidyfing agent for leather industries
Packaging & Shipping
in 25kg/50kg bags for sodium metabisulfite 65%min
Appearance: white free flowing fine crystal or powder.
Property: white or light yellow crystal powder, a strong smell of
sulfur dioxide, relative density is 1.4, easy to dissolve in 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.
Packing: packed in 25kg plastic woven bag, 25kg Kraft paper bag,
25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the
|Appearance:||White Free Flowing Fine Crystal or Powder|
1) Purity (calculated with Na2S2O5): 96%
2) Iron (Fe): 0.005%
3) SO2: 65%
4) PH value: 4.0-4.6
5)Water insoluble matter: 0.05%
1) Purity (calculated with Na2S2O5): 98%
2) Iron (Fe): 0.0005%
3) Arsenic (As): 0.0002%
4) pH value: 4.0-4.6
5) Water insoluble matter: 0.05%
6) Heavy metal (Cal. in Pb): 0.002%
|Package:||25kg, 50kg pp woven bag with plastic lining, or 1000kg per package|
1.Dye printing mordant.
2.Textile antichlor after being bleached.
3.Reducing agent and sulfonating agent for chemical and medical
4.Bamboo, wood, paper fiber bleaching agent, non-ferrous metal ore
dressing agent, waste water treating , rubber freezing agent.
1) 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);
2) Industry 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 stap; treatment agent of waste water; rubber solidifying
agent perfume industry is served as hydro carbon perfume aldehyde.
The hide profession employ to do to molt dose and piable dose and
wearproof dose; sewage treatment, and so on.
3). Pharmaceutical grade: in chemical synthesis in the production
of acrylic fibre, vitamin k, vitmin A, pharmaceutical
4). Photo grade: the sensitize industry is served as the developing
agent reductant and the protection of fixing bath dose.
The details of the product as follow:
Molecular Formula: Na2S2O5
Molecule Weight: 190.12
Storage: store the products in dry and cool place.
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