PURPOSE: The titled composition useful as a stabilizer for vehicle of coating compound, causing slight coloring even after long-term preservation, obtained by adding an N,N-dialkylhydroxylamine to a quaternary ammonium hydroxide.

CONSTITUTION: A quaternary ammonium hydroxide such as a compound shown by the formula I [R1WR6 are 1W20C alkyl, 2W3C hydroxyalkyl, or -(AO)pH (p is 2W15; A is 2W3C alkylene), benzyl, or phenyl; n is 1W5; A' is 2W12C bifunctional hydrocarbon group] is blended with 0.001W5wt%, preferably 0.01W1wt% N,N-dialkylhydroxylamine, preferably N,N-diethylhydroxylamine.

USE: Having effect as an alkalizing agent, useful as a stabilizer for binder of colloidal silica, etc., rust preventive, catalyst for producing polyester, catalyst for urethane, etc.