... in water, but non-soluble in organic solution 3 PH value of 1% solution is at 1.89 Urea PhosphateChemical formula ... ,soluble in water, but non-soluble in organic solution;PH value of 1% solution is at 1.89, and melting point ... .02Phosphorus pentoxide %≥44.044.03Nitrogen,as N %≥17.017.04PH value of 1% solution1.6∼2.01.6∼2.05Moisture %≤0 ...