Dichlorine oxide, decomposition

In contact with dichlorine oxide, calcium phosphide heats up, causing explosive decomposition of the chlorinated compound. 

Finally, the sulphide is absolutely incompatible with oxidants, chlorine (incandescence), dichlorine oxide (explosive decomposition), silver (I) oxide (ignition when the mixture is ground up). 

DOT CLASSIFICATION 4.3 Label Dangerous When Wet, Poison SAFETY PROFILE Highly toxic due to phosphide, which in presence of moisture emits phosphine. The phosphine may ignite spontaneously in air. Incandescent reaction with oxygen at 300°C. Incompatible with dichlorine oxide. When heated to decomposition it emits toxic fumes of POx. See also CALCIUM COMPOUNDS and PHOSPHIDES. 

Dichlorine oxide, CI2O, is a very soluble, reddish-yellow gas. Warming can cause explosive decomposition into CI2 and O2. Many organic solvents extract it effectively from water. 

Dichlorine monoxide is the anhydride of hypochlorous acid the two nonpolar compounds are readily interconvertible in the gas or aqueous phases via the equilibrium CI2 O + H2 0 2H0Cl. Like other chlorine oxides, CI2O has an endothermic heat of formation and is thus thermodynamically unstable with respect to decomposition into chlorine and oxygen. Dichlorine monoxide typifies the chlorine oxides as a highly reactive and explosive compound with strong oxidhing properties. Nevertheless, it can be handled safely with proper precautions. 

---