Caustic soda is also called caustic soda and caustic soda. Its chemical name is sodium hydroxide and its chemical formula is NaOH. It is one of the three acids and two bases in the chemical industry and is an extremely important chemical raw material. Highly corrosive strong alkali, usually in the form of white flakes or particles, can be dissolved in water to form an alkaline solution, and can also be dissolved in methanol and ethanol. This alkaline substance is deliquescent and will absorb water vapor in the air as well as acidic gases such as carbon dioxide.
Caustic soda has long been known as an alkaline substance. In 1787, doctor Nicolas Leblanc (1762-1806) invented a suitable process for producing sodium hydroxide from table salt and carried out large-scale production. In 1887, the Swedish chemist Arrhenius founded the acid-base ionization theory (i.e., the acid-base theory of aqueous solutions). He proposed that acids are substances in which all cations produced by ionization are hydrogen ions in aqueous solutions, and bases are substances in aqueous solutions. All anions produced by ionization are hydroxide ions. Since then, the alkalinity of sodium hydroxide has been clearly defined. Caustic soda can be used as a sewer dredging agent to remove blockages in sewer pipes, many of which are oil, body hair and food waste. Caustic soda has a good dissolving effect on this substance. When caustic soda is dissolved in water, it generates heat, which can accelerate the reaction and promote the cleaning effect. So how to properly use caustic soda for disinfection and sterilization?
Under normal circumstances, 2%-4% caustic soda solution can effectively kill most bacteria. Add 2-4 pounds of caustic soda to 100 pounds of water. The pH of the prepared solution will be between 10 and 14, and the pH of caustic soda disinfection and sterilization is required to be above 11. When using it, people can use a scoop to sprinkle caustic soda on the road or pedestrian walkways, or it is more convenient to use a spray gun. However, high-pressure water guns cannot be used to spray, as even a single use will seriously damage the machinery and equipment.
Caustic soda water cannot be in direct contact. Caustic soda water is extremely corrosive and irritating and can cause burns to the skin and mucous membranes. Therefore, caustic soda water cannot be sprinkled on people or other organisms. Usually people use caustic soda water for disinfection. Disinfect and sterilize in free space. The most commonly used area is the personnel aisle. In view of the relatively large corrosion irritation, where the caustic soda water is located, there are usually flowers that cannot bloom and grass that cannot grow. Areas disinfected with caustic soda water need to be cleaned in advance before use. Usually people disinfect with caustic soda water and then clean it with tap water for more than ten hours. If it is not cleaned thoroughly, there will be residual caustic soda on the road surface, which can easily cause burns to people or organisms in direct contact. Caustic soda can be used as a quick-acting herbicide. 5~10% caustic soda water is very effective in removing weeds. The effect can be seen in about 20 minutes, and the weeds will wither in half a day. It acts faster than paraquat pesticide. The disadvantage is that it grows back quickly. Caustic soda is highly corrosive and irritating to equipment. If the equipment is not galvanized pipes, we must clean them as soon as possible after using caustic soda. In addition, when we use caustic soda, we must pay special attention to safety protection, wear protective gloves, protective masks, protective glasses, and wear long-sleeved tops and other clothing. It is important to prevent caustic soda from burning the skin and mucous membranes. Almost everyone who comes into contact with caustic soda at work has experienced eyeball congestion and pain caused by improper use of caustic soda. Some people get nosebleeds when they smell the smell of caustic soda. This means that the smell of caustic soda burns the nasal mucosa due to improper protection. Caustic soda cannot be mixed with iron powder and aluminum powder. After caustic soda is mixed with iron powder or aluminum powder, it will react violently when exposed to boiling water, generating heat and releasing hydrogen. In the past, there were many small balloon sellers in rural areas who used steel tanks to make hydrogen-inflated balloons.
Post time: Sep-10-2024
