Description
|
white or yellow crystalline powder
|
Assay
|
98.0%min
|
Chloride
|
0.05%max
|
As
|
3ppm max
|
Pb
|
10ppm max
|
Heavy metals
|
20 ppm max
|
Sulphate
|
0.05%max
|
Reducing substances
|
0.5%max
|
Loss on drying
|
1.5%max
|
Item
|
Food grade standard
|
Industry grade standard
|
Test Result
|
Appearance
|
White or yellowish crystal powders
|
Meet the standard
|
|
Solubility
|
Easily soluble in water, slightly soluble in alcohol and insoluble in ether
|
Meet the standard
|
|
Identitification
|
Meet the standard
|
Meet the standard
|
Meet the standard
|
Assay,%
|
98.5min
|
98
|
99.5
|
Loss on dry,%
|
0.50max
|
1.0max
|
0.50max
|
Reducing substances,%
|
0.50 max
|
1.0 max
|
0.50 max
|
Sulfate,%
|
0.05 max
|
0.2 max
|
0.05 max
|
Chloride,%
|
0.07 max
|
0.1 max
|
0.07max
|
Pb, ug/g
|
10 max
|
10 max
|
10max
|
Arsenic salt, ug/g
|
3 max
|
3 max
|
3 max
|
Heavy metals, ug/g
|
20 max
|
20 max
|
20 max
|
PH
|
6.0-8.5
|
6.0-8.5
|
7.3
|