Search result for: phosphorus pentoxide*

Table showing details for phosphorus pentoxide*

Chemical	Category & User Codes	DG Class	DG PG	UN CAS No	Guidance notes
phosphorus pentoxide*  phosphorus(V) oxide  phosphoric oxide	Tch 1 2 - - 5 - -	8 CW   Hazardous Chemical	II	1807 1314-56-3	Toxic by ingestion; highly corrosive. Use eye and skin protection where splashes can occur. Reacts violently with water to form phosphoric acid, liberating a large amount of heat. Used as a dehydrating agent. Do not react with formic acid since highly toxic carbon monoxide gas is evolved. Reacts violently with iodides; sodium and potassium metals ignite on contact with phosphorus pentoxide. The crust on the surface of old samples is largely phosphoric acid and should be removed before the material underneath is used. 31