Aluminium Oxide Formula

Aluminium Oxide Formula

Aluminium oxide is a chemical substance composed of atoms of aluminium and oxygen. Aluminium loses three electrons during the chemical reaction, whereas oxygen receives two. It is often referred to as alumina. Alpha-Alumina is also known as alumina, alundum, or alkoxide. Aluminium oxide is a white, odourless, amorphous substance. Because of its numerous positive characteristics, the molecule plays an important role in a variety of life-extension and social welfare applications. It may also be found in bauxite.

Al2O3 is the Aluminium Oxide Formula. A chemical compound called Aluminium Oxide Formula comprises oxygen and aluminium atoms. Aluminium loses three electrons, and oxygen gains two during the chemical reaction. It is also known as alumina. Amorphous white aluminium oxide is odourless and colourless. Because of its numerous beneficial properties, the chemical contributes significantly to a wide range of life-extension and societal welfare applications. It can be found in the mineral bauxite as well.

Due to its strength and hardness, aluminium oxide is abrasive in most applications. Aluminium oxide is used in producing sandpaper, cutting tools, and other products as a substitute for industrial diamonds. It is most frequently used as a ceramic material. It’s a type of plastic filler. There are many cosmetic products that contain it, including nail polish, lipstick, blush, and sunscreen. It is used in the production of glass.

Aluminium Oxide Chemical Formula

Al2O3 is the formula for aluminium oxide. How did this formula come to be? First, we must remember that aluminium is a metal, and oxygen is a non-metal, resulting in an ionic compound. The aluminium and oxygen ions have some charge. The Aluminium Oxide Formula has a positive charge, whereas oxygen has a negative charge.

Using the criss-cross method, students obtain the Aluminium Oxide Formula. In the chemical process, aluminium typically loses three electrons while oxygen gains two electrons, primarily to achieve stability.

Aluminium Oxide Structural Formula

In order to create the Aluminium Oxide Formula structure, which has three oxygen atoms, two aluminium atoms must bond with two oxygen atoms each.

Aluminium chloride solution and water are produced when Aluminium Oxide Formula reacts with hot, diluted hydrochloric acid. Since all three contain oxide ions, one must remember that sodium and magnesium oxides also cause similar reactions. In this case, aluminium oxide serves as the base.

At a temperature of 900–1100 degrees Celsius, sodium aluminate and water are the by-products of the reaction between aluminium oxide and sodium hydroxide. Aluminium oxide exhibits acidic behaviour in this reaction.

Aluminium Oxide Physical Properties

  • Aluminium oxide is a white solid.
  • It is insoluble in water and other solvents.
  • Although aluminium oxide is an electrical insulator, it is thermally conductive in ceramic materials.
  • Aluminium oxide has a comparatively high melting and boiling temperatures.
  • Aluminium oxide has a density of 3.987 g/cm3.

Aluminium Oxide Chemical Properties

Aluminium oxide reacts with sodium hydroxide to generate sodium aluminate and water. This reaction happens at temperatures ranging from 900 to 1100 °C. This reaction, which uses aluminium oxide as an acid, results in salt and water.

Al2O3 + 2NaOH → 2NaAlO2 + H2O

Metal oxides are normally basic in nature, although aluminium oxide is amphoteric. As a result, it acts as both an acid and a basic. In this scenario, it functions as a base rather than an acid.

Al2O3 + H2SO4 → Al2(SO4)3 + H2O

This is referred to as a neutralisation reaction.

Aluminium oxide contains oxide ions, therefore it reacts with acids similarly to sodium or magnesium oxides. Aluminium chloride solution is generated when aluminium oxide combines with hot dilute hydrochloric acid.

Al2O3 + 6HCl → 2AlCl3 + 3H2O

Aluminium Oxide Uses

  • Aluminium oxide is commonly used as an abrasive because of its hardness and strength. Aluminium oxide is used to substitute industrial diamonds in the production of sandpaper, cutting tools, and other items.
  • It is most frequently used as a ceramic material.\
  • It’s utilised as a plastic filler.
  • It is commonly used as an ingredient in sunscreen, lipstick, blush, and nail polish.
  • It is utilised in the production of glass. Aluminosilicate glass is a common glass that contains aluminium oxide. Aluminosilicate glass contains 5-10% aluminium oxide.


Chemistry Related Formulas
Urea Formula Pyrophosphoric Acid Formula
Ammonia Formula Silicon Dioxide Formula
Bleaching Powder Formula Sodium Cyanide Formula
Molarity Formula Sodium Fluoride Formula
Oxalic Acid Formula Barium Phosphate Formula
Methane Formula Barium Oxide Formula
Sulphuric Acid Formula Calcium Bromide Formula
Aluminium Chloride Formula Dilution Formula
Chloroform Formula Folic Acid Formula
Empirical Formula Fumaric Acid Formula

FAQs (Frequently Asked Questions)

1. Is Aluminum Oxide Harmful to Humans?

When compared to other compounds, aluminium oxide is less toxic. However, as concentrations grow, so does toxicity.

2. What is the function of aluminium oxide?

Aluminium oxide is a high-quality ceramic oxide with a variety of applications in the manufacture of adsorbents and catalysts. It is also used in the aerospace sector and in the manufacture of a number of commercially significant compounds.

3. Is Aluminium Oxide Acidic or Basic?


Aluminium(III) oxide is an amphoteric metal oxide, which implies it has both acidic and basic characteristics. The acidic or basic nature of Al2O3 is dictated by the other reactant in the chemical reaction.