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Sodium metabisulphite

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period for delivery: Consignment Deadline Days
area: Beijing
Expiry date : Long Effective
last update: 2017-11-25 09:34
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Product details
CAS NO:7631-99-4

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.
Molecular Formula :Na2S2O5
Molecule Weight :190.12
CAS NO .:7681-57-4
Appearance :White Free Flowing Fine Crystal or Powder

Packing:Packed in 25kg plastic woven bag, 25kg Kraft paper bag, 25kg PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer's requirement.

Specification For Food Grade and Industry Grade :


Item


Quality Index


Food Grade


Industry Grade


Purity ( As Na2S2O5)


98.0% min


96.0% min


Sulfur Dioxide( SO2)


65.0% min


65.0% min


Arsenic ( As )


0.0002% max


-


Heavy metals ( As Pb )


0.0005% max


-


Selenium (Se )


0.0005% max


-


Iron (Fe)


0.001% max


0.002% max


Water insoluble


0.02% max


0.05% max


PH value :


4.0-4.8


4.0-4.8


Remark :


Conformed with FCC V and E 223 Standard

Specification for Pharmaceutical Grade and Photo Grade??


Item


Quality Index


Pharmaceutical Grade


Photo Grade


Purity ( As Na2S2O5)


98.0% min


98.0% min


Sulfur Dioxide( SO2)


65.0% min


65.0% min


Thiosulphate ( As S2O3)


0.05 % max


0.05% max


Chloride ( As CL-)


30 ppm max


50ppm max


Arsenic ( As )


1ppm max


1ppm?max


Lead ( Pb )


1 ppm max


2ppm max


Copper (Cu)


1 ppm max


1ppm max


Iron (Fe )


5 ppm max


5ppm max


Mercury (Hg)


0.1ppm max


1ppm max


Chromium (Cr)


1 ppm max


-


Selenium (Se )


1 ppm max


5ppm max


Zinc (Zn)


1 ppm max


1ppm max


Cadmium (Cd )


1ppm max


-


Nickel (Ni)


1ppm max


-


Na2SO3 + Na2SO4


1.5% max


-


PH value


4.0-4.8


4.0-4.8


Remark


Conformed with USP standard

Application:

(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); Inhibitor and freshen agent (e.g. day lily, seafood, fruit and vegetable 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 pliable dose and wearproof dose; sewage treatment, and so on .

(3) Pharmaceutical Grade: In chemical synthesis in the production of acrylic fibre, vitamin K, vitamin A, pharmaceutical intermediates, etc.

(4) Photo Grade: The sensitize industry is served as the developing agent reductant and the protection of fixing bath dose.

Storage:Store the product in a dry and cool place.

Packing photo:

1000kg Jumbo bag

25kg P.P woven bag

25kg Kraft paper bag

25kg PE bag

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