Name of index
|
GB
1886.4-2023
|
FCC-V
II
|
E452(i)
|
Description
|
-
|
Colourless or white, transparent platelets, granules, or powders
|
Identification
|
-
|
Pass test
|
pH of a 1 % solution
|
5.0-7.5
|
--
|
3.0-9.0
|
Solubility
|
-
|
--
|
Very soluble in water
|
Content of Inactive Phosphates (as P
2
O
5
),
w/%
≤
|
7.5
|
-
|
-
|
P
2
O
5
Content(ignited basis)
,
%
≥
|
67
|
60.0-71.0
|
60.0-71.0
|
Water insoluble
,
%
≤
|
0.06
|
0.1
|
0.1
|
Fluoride
,
mg/kg
≤
|
30
|
50
|
10
(expressed as fluorine)
|
Loss on ignition
,
%
≤
|
|
--
|
1
|
As
,
mg/kg
≤
|
3.0
|
3
|
1
|
Cadmium
,
mg/kg
≤
|
-
|
--
|
1
|
Mercury
,
mg/kg
≤
|
-
|
--
|
1
|
Lead
,
mg/kg
≤
|
-
|
4
|
1
|
Fe,
mg/kg
≤
|
200
|
-
|
-
|