CAS: 1303-28-2 EC No: 215-116-9 MDL No: MFCD00003434 RTECS: CG2275000 UN No: UN1559; Haz Class: 6.1; Packing Group: II -100 Mesh Powder Molecular Formula: As₂O₅ MW: 229.79 Melting Point: 315° (decomposes)