Specification
|
First grade
|
Upper grade
|
Appearance
|
White crystal
|
White crystal
|
Total content %
|
≥98
|
≥98
|
P2O5 content %
|
≥53
|
≥53
|
N content %
|
≥20.8
|
≥20.8
|
Moisture %
|
≤0.2
|
≤0.2
|
Water insoluble matters %
|
≤0.1
|
≤0.1
|
Heavy metal ( base on Pb ) %
|
--
|
≤0.001
|
As ( base on As ) %
|
--
|
≤0.0003
|
Fluoride ( base on F ) %
|
--
|
≤0.005
|