Beryllium Chloride(BeCl2) Properties(25 Complete Facts)

Beryllium chloride is a colourless solid that is hygroscopic and easily dissolves in many polar solvents. Let us go into detail about its facts.

Beryllium chloride is a chemical compound with the formula BeCl2. Its properties are similar to those of aluminium chloride because of the diagonal interaction between beryllium and aluminium. Chloride compounds can be converted into chlorine gas and metal through the electrolysis of BeCl2.

Let us talk about the characteristics of Beryllium chloride(BeCl2), such as its IUPAC name, molar mass, density, covalent radius, and whether it is basic or acidic.

Beryllium chloride IUPAC name

BeCl2 is also known as beryllium dichloride, according to the IUPAC name.

Beryllium chloride chemical formula

The chemical formula of beryllium chloride is BeCl2.

Beryllium chloride CAS number

The CAS registration number for beryllium chloride(BeCl2) is 7787-47-5.

Beryllium chloride ChemSpider ID

The ChemSpider ID for beryllium chloride(BeCl2) is 22991, which is specific to each molecule.

Beryllium chloride chemical classification

The following categories are used to classify beryllium chloride(BeCl2):

  • Beryllium chloride(BeCl2) is an inorganic chloride compound.
  • Beryllium chloride(BeCl2) is classified as a Strategic and vital material.
  • Beryllium chloride(BeCl2) is sp3 hybridised in solid form and sp hybridised in gaseous form.
  • Beryllium chloride(BeCl2) establishes a single covalent bond with a linear structure.
  • The beryllium chloride(BeCl2) molecule’s bond angle is 180°.

Beryllium chloride molar mass

Beryllium chloride(BeCl2) has a molar mass of 79.9182 a.m.u (atomic mass units).

Beryllium chloride color

Beryllium chloride(BeCl2) is a white to slightly yellow powder or colourless molecule.

Beryllium chloride viscosity

The viscosity of Beryllium chloride(BeCl2) is low because it is a crystalline solid substance having no colour.

Beryllium chloride molar density

The molar density of solid beryllium chloride(BeCl2) is 1.899 g/cm3.

Beryllium chloride melting point

Beryllium chloride(BeCl2) has a melting point of 399 °C (750 °F; 672 K). For such a tiny covalent molecule, the melting point is relatively high.

Beryllium chloride boiling point

Beryllium chloride(BeCl2) has a boiling point of 482 °C (900 °F; 755 K).

Beryllium chloride state at room temperature

BeCl2, or beryllium chloride, is solid at normal temperature.

Beryllium chloride covalent bond

Beryllium chloride(BeCl2) has only a single covalent bond. Because beryllium’s small atom has a high relative ionisation energy (900 kJ/mol), which prohibits it from generating cations, this is primarily the cause. It prefers to attract an electron pair that is in a bond by itself.

Beryllium chloride covalent radius

It is impossible to calculate the covalent radius for beryllium chloride(BeCl2) because it can only be calculated for a single atom. The covalent radius of the chlorine atom is 102 pm, while the radius of the beryllium atom is 112 pm. 

Beryllium chloride electron configurations

A material’s configuration of electrons inside its atomic orbitals is called its electronic configuration. Let us study the electronic structure of Beryllium chloride(BeCl2).

  • The Beryllium atoms in Beryllium chloride(BeCl2) have the electronic configurations [He]1s22s2 & [He]1s22s12p1in the ground state and excited state, respectively.
  • The chlorine atom in Beryllium chloride(BeCl2) has the electronic configuration [Ne]3s23p5.

Beryllium chloride oxidation state

In Beryllium chloride(BeCl2), the total oxidation state is 0. Be has an oxidation value of +2 in BeCl2. Cl has an oxidation value of -1 in BeCl2. As a result, the molecule has a charge-to-mass ratio of 1:2.

Beryllium chloride acidity/alkaline

  • Beryllium chloride(BeCl2) has an acidic nature because 4 water molecules coordinate with the Be2+ cation during the dissolution of BeCl2 in water. 
  • The O-H bond breaks off and releases a proton into the solution as the O-Be bond becomes stronger and stronger. 
  • The following reaction takes place,
  • BeCl2 + 2H2O → Be(OH)2 + 2H+

Is Beryllium chloride odourless?

Beryllium chloride(BeCl2) has a pungent, harsh odour.

Is Beryllium chloride paramagnetic?

Paramagnetism exists in atoms and molecules that have unpaired electrons in their valency shells. Let us discuss Beryllium chloride’s(BeCl2) magnetic behaviour.

Beryllium chloride(BeCl2)  does not exhibit magnetic behaviour, due to the utilisation of two of Be’s valence electrons in the creation of bonds with the 2 Cl atoms. In the absence of electrons, it is not possible to explain its magnetic behaviour.

Beryllium chloride hydrates

  • The Beryllium chloride(BeCl2) molecule forms a tetrahydrate of chloride such as BeCl2•4H2O([Be(H2O)4]Cl2).
  • [Be(H2O)4]2+ and chloride ions are produced along with hydrated beryllium ions. 
  • Tetraaquaberyllium ions, which are the hydrated beryllium ions, are extremely acidic.
  • BeCl2 hydrolyzes in an alkaline medium as follows:

BeCl2 + NaOH[Be(OH)4]2-

BeCl2 + H2O [Be(H2O)2]2++ 2Cl

Beryllium chloride crystal structure

  • Beryllium chloride(BeCl2) exists in a hexagonal crystal structure. It exists in 2 different polymorphic forms. 
  • Both structures are based on tetrahedral Be2+ centres and are connected by 2 pairs of chloride ligands. 
  • BeCl2 has a polymeric chain structure when it is solid. Around the Be atom, 4 Cl atoms form a tetrahedron with 2 covalent bonds and 2 coordinate bonds connecting them.
beryllium chloride properties
BeCl2 Polymeric(Solid) structure
beryllium chloride properties
 BeCl2 dimer(Gas) structure

Beryllium chloride polarity and conductivity

In addition to being non-polar, Beryllium chloride(BeCl2) is conductive because of the following reasons:

  • The molecule of beryllium chloride(BeCl2) is non-polar.
  • The Be-Cl bond, despite being polar and possessing some net dipole, lacks polarity because the dipole moments of the 2 Be-Cl bonds are equal and opposite, cancelling each other out to generate 0 dipole moment.
  • Linearly, the Be-Cl bonds are separated from one another by 180°.
  • Beryllium chloride(BeCl2) can conduct electricity when it is in a fuse condition or when it is dissolved in water.

Beryllium chloride reaction with acid

The Beryllium chloride(BeCl2) reaction of acid is extremely minimal because BeCl2 is itself acidic, but reacts with organic protic solvents and water molecules. 

BeCl2 + acid → No reaction.

Beryllium chloride reaction with base

  • The Beryllium chloride(BeCl2) reacts with bases often as LiAlH4
  • Lewis acid BeCl2 forms beryllium hydride or beryllium hydroxide when it interacts with a base. 

BeCl2 + LiAlH4 → BeH2 + LiCl + AlCl3

BeCl2 + NaOH → Be(OH)2 + NaCl

Beryllium chloride reaction with oxide

BeCl2 experiences an acid-base reaction when there is oxide present. The reaction is as follows

BeCl2 + MgO → BeO + MgCl2

Beryllium chloride reaction with metal

Lewis acid BeCl2 undergoes a redox reaction when it interacts with metal. Aqueous Beryllium nitrate and Silver chloride powder are created when dissolved beryllium chloride and dissolved Silver nitrate in water react.

BeCl2 + 2Na → 2NaCl + Be

BeCl2 + Mg → MgCl2 + Be

BeCl2 + AgNO→ Be(NO3)2 + AgCl


Beryllium chloride(BeCl2) is created when elemental beryllium reacts with chlorines at high temperatures to prepare it. To create beryllium metal through electrolysis, beryllium chloride(BeCl2) and NaCl are utilised as electrolytes.

Read more following properties

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Aluminium Chemical Properties
Magnesium hydride(MgH2)
Phosphorus Triiodide(PI3)
Boron Chemical
Nitrogen Dioxide(NO2)
Phosphorus Trichloride(PCl3)
Sulfur Trioxide(SO3)
Carbon Tetrafluoride (CF4)
Propanoic Acid (CH3CH2COOH)
Barium Hydroxide(Ba(OH)2)
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