Caustic Soda (NaOH)

What is Caustic Soda?

Caustic Soda is the chemical compound sodium hydroxide (NaOH). This compound is an alkali – a type of base that can neutralize acids and is soluble in water. Today Caustic Soda can be manufactured in the form of pellets, flakes, powders, solutions and more.

How is Caustic Soda produced?

Caustic soda (usually as NaOH) is produced as a liquid. These are produced by passing an electrical current through brine (common salt dissolved in water). This is called electrolysis, a process which has been known for over 120 years

What is Caustic Soda used for?


Application of Caustic Soda in Textile Industry

In the textile industry, caustic Soda is used for dyeing synthetic fibers such as polyester and nylon, as well as flax processing.


Application of Caustic Soda in Food Production

Peach soda is used to produce a type of salt wood to make crumbs, to process and process olives, to peel tomatoes and other fruits, to make canned food, and to peel potatoes. Other benefits of baking soda include preventing the growth of food mold and bacteria and thus helping to prevent them from spoiling.


Other Applications of Caustic Soda in the Food Industry Include the Following:

  • Milk industry
  • Chocolate production
  • Production of packaging
  • Noodle production
  • Beverage production
  • Sugar production
  • Caramel production
  • Washing fruits and vegetables
  • Canning industry


Application of Caustic Soda in Pharmacy and Medicine

It is interesting to know that caustic soda is used to produce many drugs such as aspirin, painkillers, anticoagulants, arterial anticoagulants, and more.



Application of Caustic Soda in Aluminum Extraction

Caustic soda is used as an alkaline compound for plating aluminum parts as well as for dissolving Bauxite ore and thus precipitating aluminum oxide or alumina.


Application of Caustic Soda in Paper Industry

The most common use and application of caustic soda is in the cellulose or paper industries. It is used in processes such as pulp making, pulp bleaching, water treatment and ink removal from recycled paper.

Other uses of caustic soda in the paper industry are as follow:


  • Increasing the pH of the paper fiber fermentation process
  • Separation of cellulose fibers from lignin
  • Production of pulp
  • Decomposition of wood
  • Smooth, swell and polish paper fibers
  • Improving the quality of milled paper fibers
  • Bleaching of brown fibers in the cooking process


Application of Caustic Soda in the production of cellophane and rayon or rayon


Caustic Soda lye is used to increase the gloss, luster and strength of cellulose. This processed cellulose is used to produce viscose, which is used in the production of cellophane and silk synthetic fibers. The production of these fibers in two stages of the viscous process requires the use of caustic soda.


Application of Flake Soda in the Production of Soap and Detergent

Production of detergents is another industry which Caustic Soda flake is very important in it. In this industry, sodium hydroxide is used in a process in which fats, vegetable oils and foundations are converted into soap. On the other hand, flaxseed is a very important compound for the production of essential substances called anionic surfactants in the preparation of detergents.


Application of Caustic Soda in the Production of Bleach

Bleaching agents, which are made from Caustic Soda, are mostly used in industry and are used to control mold and fungus and to remove grease.


Application of Caustic Soda in Glass Industry

Soda Ash can be used as a substitute for soda ash in many industries, including glassmaking, phosphate production and silicate.


Application of Caustic Soda in Chemical Processes

Caustic Soda is used as a raw material in the production of many chemical products, including the following:

  • Production of plastic materials
  • Adhesive production
  • Solvent production
  • Production of herbicides
  • Production of paints and inks
  • Production of coating materials


Application of Caustic Soda in the Leather Industry

Sodium Hydroxide and Sodium Sulfide are used on the inner surface of sheep and lambs in leather factories. This compound penetrates the skin and attacks the roots or hair follicles. In this way, wool and hair are easily separated from the skin.


Application of Caustic Soda in Petrochemical and Refinery

Caustic Soda or Sodium Hydroxide is used in oil exploration, production and processing of natural gas and oil.


Application of Caustic Soda in the Production of Renewable Fuels and Energy

Caustic Soda is used in the production of fuel cells as well as in the production of epoxy resins used in the production of wind turbines. On the other hand, Caustic Soda is used to adjust the pH to produce sodium methyl and finally to produce biodiesel and bioethanol.


Application of Caustic Soda in Water and Wastewater Treatment

As you know, bleach or Sodium Hypochlorite is a kind of disinfectant and the benefit of flaxseed is used in its production. On the other hand, Caustic Soda is also used to help remove heavy metals and control the acidity of water in the treatment plant and water and sewage system.


Applications of Caustic Soda for home washing

Caustic Soda is also used in home and industry for washing. Before starting work, wear safety equipment such as masks, gloves and goggles to avoid endangering your health. The method of washing with Sodium Hydroxide is as follows:

  • Washing the sink pipes: Pour 1 kg of flake soda in the sink and then open the faucet. Caustic Soda reacts quickly with water and rinses pipes well as they pass through.
  • Washing the kitchen hood filter: To remove the grease from the kitchen hood filter, you can pour some Caustic Soda in a bowl of water and then put the hood filter in this mixture. Caustic soda is a strong degreaser, so it will easily remove all grease particles from the hood filter.


Other industries in which caustic soda is used include the following:

  • Ceramic industry
  • Alcohol industry
  • The automotive industry
  • Neutralize the battery industry acid
  • Washing fuel and oil tankers
  • Rubber recycling industry
  • metal plating
  • Washing tanks and pipes
  • Drilling industry
  • Starch production
  • Cartooning industry
  • Degreasing and degreasing industry
  • In the laboratory and to determine the concentration of various acids
  • Cosmetics industry


What is Caustic Soda packaging?

Sodium Hydroxide flake packing must be from two ply laminated polypropylene bags that sealed completely with strong polyester yarn, if using normal yarn for sealing the bags after a little time Sodium Hydroxide flake will solve the yarn.

Best Packing of Caustic Soda flake would be 25 kg PP bags and for keeping away from injuries when transporting its better putting 25 kg bags in Jumbo bags.


Safety Tips for Using Benefits

You can prevent incidents by following some safety tips in maintaining and using the Caustic Soda. These tips are as follows:

  • Storing Caustic Soda: Store Caustic Soda in small packages in a cool, dry, well-ventilated environment away from inorganic and organic matter, especially acids.
  • Working with Caustic Soda: Use safety gloves, durable shoes, chemical mask, and safety clothing while working with Caustic Soda. To equip the work environment and provide first aid as soon as possible, have an eyewash solution, shower, and some other equipment in the workshop.
  • Equip the workshop: Equip the workshop with fire extinguishers to prevent any problems such as the ignition. Although Caustic Soda is non-flammable, it produces very high heat in contact with water and some other materials, which can be dangerous.


Complications of Contact with Caustic Soda

Caustic Soda is a corrosive substance and therefore safety instructions should be observed when using it. In general, the use of this substance may pose a risk to individuals and users in the following ways.

  • Skin contact: Peeling benefit in both solid and liquid form, in contact with the skin leads to redness and irritation. If this contact is prolonged, it can cause severe burns and serious damage to the skin tissue. So when using this material, use gloves, clothes and safety masks.
  • Eye contact: The benefit of flakes in eye contact is the breakdown of adipose tissue and the formation of dangerous lesions. These lesions and complications mostly depend on the duration of eye contact with the benefit of the peel and its concentration, and may even lead to blindness. So wear goggles or a safety mask when using this substance.
  • Swallowing: The entry of flaxseed into the stomach and gastrointestinal tract will have dangerous complications and consequences. Swallowing this substance causes swelling, burns, sores, and severe pain in the mouth, throat, trachea, and stomach, and can cause cancer if contact continues or is high.
  • Inhalation: As mentioned earlier, Caustic Soda is a corrosive substance and produces a lot of vapors. Inhalation of these vapors irritates the lungs, resulting in shortness of breath. If this continues, the person may develop asthma.