12355-85-0 1303-28-2 13843-65-7 ARSENIC PENTOXIDE Anhydride arsenique [French] Arsenic acid anhydride Arsenic anhydride Arsenic oxide Arsenic oxide (As2O5) Arsenic oxide As2O5 Arsenic pentaoxide Arsenic pentoxide [UN1559] [Poison] Arsenic(5+) oxide Arsenic(V) oxide Caswell No. 057 Diarsenic pentaoxide Diarsenic pentoxide EINECS 215-116-9 EPA Pesticide Chemical Code 006802 HSDB 429 RCRA waste no. P011 RCRA waste number P011 UN1559