Specification

Tech Grade

Food Grade

FCC-IV

Appearance

White Powder

White Powder

White Powder

Main contents                  %  ≥

98.0

98.0

98

Phosphorus pentoxide P2O5     % ≥

40.0

40.0

40.0

K2O                                  % ≥

52.0

52.0

52.0

PH of a 1% solution

8.2-9.3

8.2-9.3

8.8-9.2

Water insoluble                 % ≤

0.1

0.1

0.2

Fluoride, as F            

10ppm

30ppm

Heavy metals, as Pb  

10ppm

15ppm

Arsenic ,as As           

3ppm

3ppm

Chlorides as Cl-          % ≤

0.05

0.05

Lead Pb

2ppm