... -3 3.Place of Origin: Zhejiang China (Mainland) 4.Purity: 99% Phosphorus Pentoxide(P2O5) Place of Origin Zhejiang, China (Mainland) CAS ... No. 1314-56-3 Purity 99%Phosphorus Pentoxide is a white, flammable, dangerous, and extremely deliquescent ... 2,Manufacture of Products 3,Quick Delivery 4,Good Package 5,Good Service