Phosphorus -P (Tested as per IS 7874) 17.00% Min Calcium - Ca (Tested as per IS 13433 (Part 1)) 23.00% Min fluorine - F (Tested as per IS 5470:2002) 1000 ppm Max Loss on Ignition (L.O.I.) of moisture free sample 22.00% to 26.50% Acid Insoluble Ash 1.00% Max Total Ash of moisture free Sample 73.50% to 78.00% Moisture (Tested as per IS 5470:2002) 5.00% Max Lead - Pb 30 ppm Max Arsenic - As203 10 ppm Max