ITEM                                                                                    STANDARD
             P2O5 assay content %                                                       65-70
             Water insoluble Matter %                                                   0.01 max
             Chloride %                                                                            0.002 max
             Sulfate SO4 %                                                                      0.01 max
             Phosphate                                                                            Qualified
             Fe %                                                                                       0.005 max
             AS %                                                                                       0.0002 max
             Heavy Metals Pb %                                                              0.002 max
             Potassium Permanganate-reducing substances        Qualified