Product details
Quick details:
Classification: Sulphate Type: Ammonium Sulphate CAS No.: 7681-57-4
Other Names: Sodium pyrosulfite, SMBS Place of Origin: Tianjin China (Mainland)
MF: Na2S2O5 Purity: >98% for food grade >96% for industrial...
EINECS No.: 231-673-0 Grade Standard: Food Grade, Industrial Grade
HS Code: 2832100000 Appearance: White or light yellow crystal powder...
Packaging: 25kgs/50kgs net in plastic woven bag with PP lining load 25 MT in 20 FCL"
1. Both food & tech grade
2. Steady high quality
3.Nicest price &Good service
3.Nicest price &Good service
4. Prompt delivery
Sodium Metabisulfite
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.
Molecule Weight: 190.12
Specification For Food Grade and Industry Grade:
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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 :
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Conformed with FCC V and E 223 Standard
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|
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%mn
|
0.05%min
|
|
Chloride ( As CL-) :
|
30pm max
|
50ppm max
|
|
Arsenic ( As ) :
|
1ppm max
|
1ppm max
|
|
Lead ( Pb ) :
|
1ppm max
|
2pm max
|
|
Copper (Cu) :
|
1ppm max
|
1ppm max
|
|
Iron (Fe ) :
|
5pm max
|
5pm max
|
|
Mercury (Hg) :
|
0.1m max
|
1ppm max
|
|
Chromium (Cr) :
|
1ppm max
|
---
|
|
Selenium (Se ) :
|
1ppm max
|
5m 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 :
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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 .
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.