Weifang Qihui Chemical Co.,Ltd.
- Country:
China (Mainland) - Business License:
- Business type: Trading Company
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Sodium Metabisulphite CAS NO.7681-57-4
- Min.Order Quantity:
- 50 Metric Ton
- Purity:
- 97%MIN
- Port:
- Qing dao Port
- Payment Terms:
- L/C,T/T
Product Details
Keywords
- Sodium Metabisulphite
- 97%MIn Sodium Metabisulphite
- 98%Min Sodium Metabisulphite
Quick Details
- ProName: Sodium Metabisulphite
- CasNo: 7681-57-4
- Appearance: White Powder Crystal
- Application: (1) Food Grade: Bleach agent (e.g. can...
- DeliveryTime: in 10 days
- PackAge: 25kg bag
- Port: Qing dao Port
- ProductionCapacity: 3000 Metric Ton/Month
- Purity: 97%MIN
- Storage: Keep it dry, ventilative and cool.
- Transportation: by sea
- LimitNum: 50 Metric Ton
- Grade: Industrial Grade,Food Grade
Superiority
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
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.
Details
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
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)
|
0.002% max
|
0.003% 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
|
|
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