Abstract: An oxidative aqueous solution for the purification of carbide acetylene that is acetylene, containing hydrogen phosphide and hydrogen sulphide admixtures, comprising cupric chloride, mercuric chloride and hydrochloric acid.The proposed solution has a high activity and the ability of purifying a great amount of acetylene in one purification cycle before regeneration. One liter of the solution before regeneration purifies 300 - 6000 liters of carbide acetylene, that is, acetylene at a space velocity of 30 to 80 min.sup..sup.-1. The solution is noted for its stability.In case of alternating the cycles of acetylene purification and solution regeneration 1 liter of this solution purifies 10000 to 30000 liters of acetylene without the additional introduction of the initial components into the solution.