Testing Item
Standard
Result
Appearance
White or almost white, crystalline powder or small, colourless granule
conforms
Assay (on dry basis)
98.5% ~ 101.0%
100.0%
Identification
A: IR absorption;
C: Reaction of nitrates
conforms
Appearance of solution
Clear, not more intense than Y7
conforms
PH
6.8 ~ 7.5
7.2
Loss on drying
≤0.5%
0.08%
Chloride
≤0.06%
<0.06%
Sulphated ash
≤0.1%
0.02%
Heavy metals
≤10 ppm
<10 ppm