The Caustic Soda manufacture located in Iraq, Basra Governorate, in the oil fields area of Al-Bargesiah, on an area of 45 dunums. The productivity of the plant reaches 120 tons per day at concentrations ranging from 5% to 70%. We have different kinds of mixing like mix Sodium Hydroxide with water 50-52%. Caustic Soda, caustic, alkali, and lye are all common names for sodium hydroxide (NaOH). It is used in most water-base muds to increase and maintain pH and alkalinity. It is a hazardous material to handle because it is very caustic and gives off heat when dissolved in water. Proper training and equipment are needed to handle it safely.