No

 Specifications

 food grade Superior grade

 1  

 Appearance                                   

 White powder

 2  

 Main content                              %≥

 98.0

 3 

 P2O5                                         %≥

 49.0

 4 

 pH of 1% water solution

 9.0-9.4

 5  

 Water insoluble                          %≤

 0.1

 6 

 Arsenic, as As                           %≤

 0.0003

 7  

 Fluoride, as F                             %≤

 0.003

 8 

 Heavy metal, as Pb                    %≤

 0.001

 9 

 Sieve test(Through 60 mesh)       %≥

 90.0