Appearance white powder P2o5 content % f 68 f 69 N content %f1314-15 Average polymerization degree n f20 f50 Ph value ( 1% aqueous solution ) ( 10% aqueous suspension )4.5-6.5--6.0fa0.55.7fa0.5 Particle sizecf-app120 %(w/w)cf-app130 %(w/w)cf-app160 %(w/w)95 25kg woven bag with plastic liner.