es, such as sodium methoxide, and quarternary ammonium hydroxides, such as trimethyl ammonium hydroxide, trimethyl-n-propylammonium hydroxide, benzyl trimethyl ammonium hydroxide, dimethylethyl-n-propylammonium hydroxide; and the acid is any acid of sufficient strength to neutralize the base, such as hydrochloric acid, sulfuric acid or nitric acid, with hydrochloric and sulfuric acid the preferred