Egyptian Rock Phosphate Powder Specifications P2O5 : 28.0% min Noisture : 4% max Solubility in 2% Citric Acid : 32% min Colour : Yellow Brown Size : 4.5mm (2%) 4.5–0.16mm (70%) 0.05-0.16mm (28%) Packing : In 50KGs/wpp bags Origin : Egypt