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Sodium hydroxide, also known as lye and caustic soda, is an inorganic compound with the formula NaOH. It is a white solid ionic compound consisting of sodium cations Na+ and hydroxide anions OH−..
S 2028 (OTTO) Sodium hydroxide N/10 solution Cas 1310-73-2 - used to remove the last traces of carbon dioxide from hydrogen, or other gases.