un1814 potassium hydroxide solutionalcoholic potassium hydroxide solutionuse of ammonium hydroxideammonium solutionconcentrated ammonium hydroxideun1814 potassium hydroxideconcentrated potassium hydroxidetetramethyl ammonium hydroxideammonia ammonium hydroxideaqueous ammonium hydroxidetetrabutyl ammonium hydroxideammonium hydroxide in water