Item

Internal Quality Control Index*

Total P Content(P Unit) %

≥18.0

Calcium Content(Ca Unit) %

≥21.0

Fluorine Content(F Unit) %

≤0.18

Arsenic Content(As Unit) %

≤0.003

Heavy Metal Unit(Pb Unit) %

≤0.003

Particle Size(Beneath 500μm Sieve) %

≥95