Caustic Soda ke alkali e matla e nang le ho bola ho matla, hangata e le li-flakes kapa li-blocks, tse qhibilihang habonolo metsing (exothermic ha e qhibiliha ka metsing) 'me e etsa tharollo ea alkaline, le deliquescent.
Ho ea ka thobalano, ho bonolo ho monya mouoane oa metsi (mouoane) le carbon dioxide (ho senyeha) moeeng, 'me o ka kenngoa ka hydrochloric acid ho hlahloba hore na o senyehile.