Item

Standard

Result

Main content% ≥

99.0

99.65

Phosphorus pentoxide% ≥

53.0

53.6

Nitrogen, as N % ≥

20.5

21.3

PH value of 1% solution

7.6-8.2

8.1

Fluoride, as F % ≤

0.001

0.001

Heavy metals, as Pb   % ≤

0.001

0.001

Arsenic, as As    % ≤

0.0005

0.0003

Moisture % ≤

5.0

0.16

Water insoluble % ≤

0.10

0.004