Caustic Soda is a strong alkali with strong corrosiveness, generally in the form of flakes or blocks, easily soluble in water (exothermic when dissolved in water) and forms an alkaline solution, and deliquescent
Sexually, it is easy to absorb water vapor (deliquescent) and carbon dioxide (deterioration) in the air, and itcan be added with hydrochloric acid to check whether it is deteriorated.