Sodium hydroxide is used with hydrochloric acid to balance pH. Liquid toilet bowl cleaners contain other acids, typically dilute hydrochloric, phosphoric, or formic acids. Crystalline boron is chemically inert and resistant to attack by boiling hydrofluoric or hydrochloric acid. Concentrated hydrochloric acid (fuming hydrochloric acid) forms acidic mists. Trimethylammonium chloride is a hygroscopic colorless solid prepared from hydrochloric acid. Lithium chloride is produced by treatment of lithium carbonate with hydrochloric acid. The reaction of permanganate with concentrated hydrochloric acid gives chlorine. Hydrated aluminium trichloride is prepared by dissolving aluminium oxides in hydrochloric acid. Salts of in hydrochloric acid can be extracted into diethyl ether. Nickel(II) chloride is produced by dissolving nickel or its oxide in hydrochloric acid. Lead dioxide is a strong oxidizing agent, capable of oxidizing hydrochloric acid to chlorine gas. Most hydrogen chloride is used in the production of hydrochloric acid. Ammonium salts formed from the acid-base reaction with hydrochloric acid are known as hydrochlorides. However, hydrogen chloride production continued as a step in hydrochloric acid production. Treating the soap with hydrochloric acid gives myristic acid.