------------ Caustic Soda ------------


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What is caustic?

Caustic Soda, also known as sodium hydroxide, has the chemical formula NaOH. 

In English it is known as Caustic Soda. Caustic means caustic and corrosive. It reacts with the skin in direct contact with the skin. It is a moisture-attracting substance in white color. 

It is a basic compound used in chemistry and many industries. Caustic soda, which has no odor, dissolves easily in water and turns into a soft and slippery solution that feels like soap.  It exists in liquid or solid form, the solid form in the form of sequins and beads, and the liquid form in the form of an aqueous and slippery solution.  Although it is not known how, caustic was discovered by Humphrey Day in 1807. Caustic, which has an itching effect when touched with bare hands, does not occur naturally but is very easy to produce.

Molar mass39.997 g/mol 
 Formula NaOH
 Density 2.13 g/cm³
PH  13
IUPAC IDSodium oxidanide, Sodium hydroxide 
 Soluble inWater, Ethanol, Methanol  

Usages of Caustic Soda

It is one of the raw materials of the soap we know. Glycerin and soap are produced from the reaction of caustic soda and oil. At the same time, sink openers are actually nothing more than the caustic soda we know. Used in laboratories to capture acidic gases, caustic soda is used in industry to make many chemicals and in oil refineries. In contact with water, it raises the temperature to 50 degrees within 5 minutes and maintains this temperature for approximately 15 minutes. Let’s examine in detail the places where caustic is used …


It is used in sewage and treatment plants for cleaning pipes, removing bad odors and acid control. Caustic drain opening is frequently tried in our country and it is a dangerous job. Caustic acid is an acid-based material and a very good disinfectant at the same time. When combined with water, it releases heat and is caustic. Caustic Soda, which can cause serious damage to the skin, eyes and respiratory tract, should be used with goggles and gloves and its odor should never be inhaled. In some sources, it is written to be used for various purposes at home, but caustic is classified as dangerous and chemical substances and it is recommended to keep it away from the home environment. It is very prone to react with water. Flame and heat may occur in reaction with water.


In addition to being used to remove residues and bleach the final product, it is also used to make artificial silk.


Caustic Soda is used in the paper industry as an adhesive, in heat printing and in newsprint. It is one of the indispensable ingredients in the production of paper and pulp.


In material production; it is used in the production of sodium aluminate, sodium cyanide, silicate, polycarbonate, titanium oxide and zeolite.


Caustic Soda is used in the detergent industry to make sodium hypochloride, soap, oven and pipe cleaners.

In the food sector 

Caustic Soda is used to increase edible oil, to chemically peel fruit and vegetable skins, to soften and darken olives in olive processing, in chocolate and cocoa processing, in caramel and soft drink production and in thickening ice cream. It is also used in the beverage and dairy industry for degreasing, water treatment and equipment cleaning.

In the pharmaceutical industry

Caustic Soda is used in the production of aspirin and antiseptics.

In Mining

It is used to clean the acid unit in filters and mines. It is also used in oil exploration and natural gas processing; cleaning acid residues in refinery products, removing phenols, pH balancing in drilling mud. Things to Consider When Using Caustic

1) Caustic Soda reacts and dissolves when combined with boiling water. As the caustic soda dissolves, it will emit a toxic vapor and splash around. The caustic solution is extremely harmful and caustic. Therefore, people who want to use caustic soda should wear gloves, goggles and a mask.

2) The vapor produced when caustic soda is mixed with water should not be inhaled through the nose.

3) No open areas of skin should remain when using caustic.

4) If caustic fluid comes into contact with the skin, burns and irritation will occur. In case of skin contact with caustic soda, all clothing should be removed and the area where the caustic soda has come into contact should be placed under running water for 15 minutes. All clothing should also be washed in boiling water.

5) Permanent eye damage may occur when caustic soda comes into contact with the eyes. For this reason, goggles must be worn when using caustic soda. In case of eye contact with caustic soda, keep the eyelids open and rinse with cold water for at least 15 minutes.

6) Small operations such as sink and toilet drains can be done by the person by taking caustic. However, professional companies should be consulted for cleaning large drains such as pipe installations. Professional plumbing companies will completely open the drains without causing any damage by using special caustics and professional devices.

7) If caustic soda is used too much, it will melt the drain pipes and the seals at the joints. For this reason, an installation company should be consulted for more than one use of caustic soda.

Note: Use in the home environment carries health and safety risks.

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