The "Barking Dog" is an exothermic chemical reaction that results from the ignition of a mixture of carbon disulfide and nitrous oxide.[1] When ignited in a cylindrical tube, the reaction produces a bright flash and a loud "woof" - reminiscent of a barking dog.
In simple terms, the 'Barking Dog' reaction is a combustion process, in which a fuel (carbon disulfide, CS2) reacts with an oxidizing agent (nitrous oxide, N2O), producing heat and elemental sulfur. The flame front in the reaction is a zone of very hot, luminous gas, produced by the reactants decomposing.
In April 1853, Justus von Liebig performed the demonstration in front of the Bavarian royal family; however, the glass container shattered, and shards of glass inflicted minor injuries on the faces of Queen Therese, her son Prince Luitpold, and Liebig himself.[2][3]