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sodium metabisulfite 98%
sodium metabisulfite 98%
Supplier Info
[China Supplier]
Contact Person : Ms. Yang Eillen
Tel : 86-0536-15725060312
Fax : 86-0536-5787617
Product Detail
1. Purity: 98% 2. good quality , competitive price 3.provide best service 4.price advantage 5.prompt deliver

Sodium metabisulphite

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.It has acidity ,and its solubility will become large while raising the temperature and is less to dissolve in ethanol.

Specification For Food Grade and Industry Grade :

Item

Quality Index

Food Grade

Industry Grade

Purity ( As Na2S2O5)

98.0% min

97.0% 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-)

30ppm max

50ppm max

Arsenic(As)

1ppm max

1ppm max

Lead(Pb)

1ppm max

2ppm max

Cooper(Cu)

1ppm max

1ppm max

Iron(Fe)

5ppm max

5ppm max

Mercury(Hg)

0.1ppm max

1ppm max

Chromium(Cr)

1ppm max

-

Selenium (Se )

1ppm max

5ppm max

Zinc(Zn)

1ppm 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

sodium metabisulfite 98%

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