Test item  | Normal type  | Light type  | |
Identification  | Passes test  | Passes test  | |
Content, on the ignited basis  | ≥  | 90.0 %  | ---  | 
Assay(as Ca)  | ---  | 34.0-40.0 %  | |
Content(P2O5), on the anhydrous basis  | 38.5-48.0 %  | 38.5-48.0 %  | |
Loss on ignition (800°C±25°C, 0.5 hour)  | ≤  | 8.0 %  | 8.0 %  | 
Moisture  | ≤  | ---  | 3.0 %  | 
Arsenic  | ≤  | 1.0 mg/kg  | 3.0 mg/kg  | 
Fluoride  | ≤  | 50.0 mg/kg  | 50.0 mg/kg  | 
Lead  | ≤  | 1.0 mg/kg  | 1.0 mg/kg  | 
Cadmium  | ≤  | 1.0 mg/kg  | 1.0 mg/kg  | 
Mercury  | ≤  | 1.0 mg/kg  | 1.0 mg/kg  | 
Aluminium  | ≤  | ---  | 200 mg/kg  | 
Particle size  | 325 mesh  | D50 3-5 microns  | |
Bulk density  | ---  | 0.15-0.35 g/ml  |