Sodium Metabisulfite
Sodium Metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium metabisulfite. It is used as a disinfectant, antioxidant and preservative agent.
Product Informations:
|
CAS No.
|
7681-57-4
|
|
EINECE
|
231-673-0
|
|
HS CODE
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2832100000
|
|
MOLECULAR FORMULA
|
Na2S2O5
|
Specifications:
1) Food Grade
|
Items
|
Specifications
|
Typical Analysis
|
|
Colour
|
/
|
White or yellowish
|
White
|
|
State
|
/
|
Crystalline powder
|
Crystalline powder
|
|
Na2S2O5
|
(%)
|
96.5 Min.
|
97.1
|
|
Fe
|
(%)
|
0.003 Max
|
0.0021
|
|
Clarity
|
/
|
Passed
|
Passed
|
|
As
|
(ppm)
|
1.0 Max
|
0.85
|
|
Heavy Metal(as Pb)
|
(ppm)
|
5.0 Max
|
0.04
|
2) Industrail Grade
|
Items
|
Specifications
|
Typical Analysis
|
|
Na2S2O5
|
(%)
|
96.5 Min.
|
96.83
|
|
Fe
|
(%)
|
0.003 Max
|
0.0006
|
|
As
|
(ppm)
|
1.0 Max
|
0.8
|
|
Heavy Metal(as Pb)
|
(ppm)
|
5.0 Max
|
2.0
|
Technical Specification
| Tests |
Specification |
| Appearance |
White free-flowing Crystal Powder |
| Purity (Na2S2O5) |
97% min |
| Iron (Fe) |
0.003% min |
| Heavy Metal (Pb) |
5 ppm max |
| Arsenic (As) |
1 ppm max |
| Water Insoluble |
0.05% max |
| PH Value |
4.0-4.6 |
Packing
25kgs/PP PE BAG
Storage and Transportation
kept in a light-proof,well-colsed,dry and cool place.
FAQ
Q1.Where is your factory located?
Our factory is in shandong, China. Located in an independent chemical park.
Q2.Can you give me a better price?
We value the cooperation with each customer and will provide you with the most favorable price.
Q3. How can you guarantee your quality?
Our production adopts fully automated production control to ensure the continuity of production and the stability of quality. We have a strict production quality management system. Strict quality control is implemented on the raw materials, semi-finished products, finished products and products leaving the factory. Quality first has always been the basic principle of our company. We also support customers to obtain samples for testing.
Q4.When is the delivery time?
Our production capacity: Xanthate: 50,000t/a; Dithiophosphate: 20,000t/a; Frother: 10,000t/a. For conventional products, we will keep inventory to ensure timely delivery within the time required by customers.
Q5:Which type of shipping would be better?
In consideration of the requirements of the customers in different rigions, we make deliveries by sea, air, train, truck, etc.
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