| ≥1 piece |
|
ITEM
|
GB25548-2010
|
FCC-V
|
E282
|
|
Appearance
|
White crystalline powder/White granular /white crystal
|
||
|
Smell
|
Without odor or with a slight propionic acid odor
|
||
|
assay (as dry basis) ≥ w%
|
99.0
|
99.0-100.5
|
99.0
|
|
Insoluble in water ≤ w%
|
0.30
|
0.20
|
0.30
|
|
PH (10% Aqueous Solution)
|
7.0-9.0
|
7.5-10.5
|
6.0-9.0
|
|
Loss on drying ≤ w%
|
9.5
|
5.0
|
4.0
|
|
Free acid ≤%
|
qualified
|
-------
|
-------
|
|
Free alkalinity ≤%
|
qualified
|
-------
|
-------
|
|
Heavy metals(as pb basis) ≤%
|
0.001
|
-------
|
0.001
|
|
Arsenic (As) ≤%
|
0.0004
|
-------
|
0.0003
|
|
Fluoride ≤%
|
0.003
|
0.003
|
0.001
|
|
Lead(Pb) ≤%
|
-------
|
0.0002
|
0.0005
|
|
Magnesium ≤%
|
-------
|
0.40
|
-------
|
|
Mercury(Hg) ≤%
|
-------
|
-------
|
0.0001
|
|
Iron ≤%
|
-------
|
-------
|
0.005
|