Our SHMP is manufactured via natural gas method Purity (as P2O5) 68. 0% min Inactive Phosphate 7. 0% max Water Insolubles 0. 05% max PH Value 5. 8-7. 3 Iron (as Fe) 100ppm max Appearance White Powder / Granule PACKAGING: 25kg / 50lb PP woven bags with PE liner or 25kg / 50lb Kraft paper bags with PE liner, 1MT / 2000lb super sacks with PE liner