PRODUCTION OF ANHYDROUS ALPHA-HALOGENATED LOWER ALKYL ALDEHYDE COMPOUND

PURPOSE:To provide a method for producing an anhydrous alpha-halogenated lower alkyl aldehyde compound important as an intermediate for synthesizing medicines, agricultural chemicals, etc., in a good yield without being polymerized. CONSTITUTION:A method for producing an anhydrous alpha-halogenated alkyl aldehyde compound comprises adding an acid to the aqueous solution of an alpha-halogenated lower alkyl aldehyde compound (e.g. monochloroacetaldehyde), preferably the aqueous solution having a concentration of 30-50wt.%, or reacting the aqueous solution with an oxidizing agent (e.g. hydrogen peroxide) to lower the pH of the aqueous solution to