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Sodium Hydroxide

Name: Sodium Hydroxide

Cas: 1310-73-2

Purity: 99%min


Directory Guidance on Sodium Hydroxide

Chemical Structure


Basic Info:

CAS No:1310-73-2
Stock AvailabilityIn stock
Brand NameLook chem

Product Introduction:

Sodium hydroxide: The chemical formula is NaOH, commonly known as caustic soda, caustic soda, flake soda, caustic soda (also known as “Koshi’s” in Hong Kong), and is a highly corrosive strong alkali.

Sodium hydroxide is actually a salt, because it undergoes hydrolysis in water to make the solution alkaline, and because it has some similar properties to caustic soda, it is side by side with caustic soda, and is called “two alkalis” in industry.

Sodium Hydroxide is generally in the form of white flakes or granules. It is easily soluble in water and forms an alkaline solution, which can enhance the conductivity of water.

The industrial product contains a small amount of sodium chloride and sodium carbonate, which is a white opaque solid.

The impurities contained in sodium hydroxide usually include iron, sodium chloride, silicate, carbonate, etc.

NaOH is one of the necessary chemicals in chemical laboratories, and it is also one of the common chemicals.

Nature and Specifications:

Product Packaging


Product Usage:

Sodium Hydroxide is a basic chemical raw material, so sodium hydroxide has a wide variety of uses.

It is utilized as a high-purity reagent and is commonly made use of in chemical, metallurgy, paper, oil, fabric and daily chemical markets.

  • Sodium Hydroxide is frequently made use of in the production of paper and also cellulose pulp.
  • Utilized in the manufacturing of soaps, artificial cleaning agents, artificial fatty acids and also the refining of animal as well as vegetable oils and also fats.
  • The textile printing and dyeing industry utilizes Sodium Hydroxide as a cotton desizing representative, a scouring representative and a mercerizing agent.
  • The chemical industry is made use of to generate borax, sodium cyanide, formic acid, oxalic acid, phenol, and so on.
  • The oil industry is used for refining petroleum products and in oil field drilling muds.
  • Sodium Hydroxide is also used in the manufacturing of alumina, metal zinc and metal copper surface therapies as well as in glass, enamel, tanning, dyes, chemicals and also drugs.
  • Food-grade products are used as acid neutralizers in the food sector, peeling agents for citrus, peaches, etc, as well as deodorizers as well as decolorizers.

In chemical experiments, along with being made use of as a reagent, it can likewise be used as an alkaline desiccant because of its strong hygroscopicity.

The sector that uses the most caustic soda is the manufacture of chemicals, followed by the manufacture of paper, aluminum, tungsten, rayon, rayon and soap.

In addition, in the production of dyes, plastics, pharmaceuticals and organic intermediates, the regeneration of old rubber, the production of sodium metal, the electrolysis of water and the production of inorganic salts, the production of borax, chromium salts, manganates, phosphates, etc., should also be used. Lots of caustic soda.

Chemical Properties of Sodium Hydroxide


Sodium hydroxide can undergo acid-base neutralization reaction with any protonic acid (NaOH dissolved in water will completely dissociate into sodium ions and hydroxide ions, so it has the generality of alkali):
NaOH + HCl = NaCl + H₂O (metathesis reaction)
2NaOH + H₂SO₄=Na₂SO₄+2H₂O (metathesis reaction)
NaOH + HNO₃=NaNO₃+H₂O (metathesis reaction)

Similarly, its solution can undergo metathesis reaction with salt solution:
NaOH + NH₄Cl = NaCl + NH₃ H₂O
2NaOH + CuSO₄= Cu(OH)₂↓+ Na₂SO₄
2NaOH+MgCl₂= 2NaCl+Mg(OH)₂↓

Saponification Reaction

In many organic reactions, sodium hydroxide also plays a similar role as a catalyst, of which the most representative is the saponification reaction:


The reason why sodium hydroxide is easy to deteriorate in the air is because the air contains carbon dioxide:
2NaOH + CO₂ = Na₂CO₃ + H₂O

If excess carbon dioxide is continuously introduced, sodium bicarbonate, commonly known as baking soda, will be formed. The reaction equation is as follows:
Na₂CO₃ + CO₂ + H₂O = 2NaHCO₃

Likewise, sodium hydroxide can react with acidic oxides like sulfur dioxide as follows:
2NaOH + SiO₂ = Na₂SiO₃ + H₂O
2NaOH + SO₂ (trace) = Na₂SO₃ + H₂O
NaOH + SO₂ (excess) = NaHSO₃ (formed Na₂SO₃ and water react with excess SO₂ to form NaHSO₃)

Color Reaction

It reacts with the indicator:
Sodium hydroxide solution usually turns litmus solution blue and phenolphthalein solution red.


Sodium hydroxide is slightly corrosive to glass products, and the two will generate sodium silicate, which makes the piston in the glass instrument stick to the instrument. If the hot NaOH solution is kept in a glass container for a long time, the glass container will be damaged.

Related References:

  1. “Sodium hydroxide” Compound Summary – PubChem | 2022-01-15.
  2. “Sodium Hydroxide | Introduction, Uses, Features, and More” – ChemicalSafetyFacts | Retrieved: 2022-01-20
  3. Wikipedia

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