Caustic Soda yog ib qho muaj zog alkali nrog muaj zog corrosiveness, feem ntau nyob rau hauv daim ntawv ntawm flakes los yog blocks, yooj yim soluble nyob rau hauv dej (exothermic thaum yaj nyob rau hauv dej) thiab tsim ib tug alkaline tov, thiab deliquescent.
Kev sib deev, nws yooj yim rau nqus dej vapor (deliquescent) thiab carbon dioxide (deterioration) hauv huab cua, thiab nws tuaj yeem muab ntxiv nrog hydrochloric acid los xyuas seb nws puas puas lawm.