| ≥1 piece |
|
Item
|
FCC-2000
|
GB25563—2010
|
|
|
Content ≥%
|
97.0
|
97.0
|
|
|
Arsenic As ≤ mg/kg
|
3
|
3
|
|
|
Fluoride F ≤ mg/kg
|
10
|
10
|
|
|
Heavy metals ≤ mg/kg
|
15
|
10
|
|
|
lead pb ≤ mg/kg
|
2
|
2
|
|
|
PH Value(10 g /L Water Solution)
|
--
|
11.5 12.5
|
|
|
Water insolubles ≤ %
|
0.2
|
0.2
|
|
|
Loss on heating
|
anhydrous≤%
|
5.0
|
5.0
|
|
monohydrate %
|
8.0 20.0
|
8.0 20.0
|
|
|
heptahydrate %
|
35.0 40.0
|
35.0 40.0
|
|