Sulfuryl Chloride(SO2Cl2) Properties(25 Complete Facts)

Sulfuryl chloride is a strong acid with formula SO2Cl2. Let us explore sulfurylchloride in detail.

Sulfuryl chloride can be prepared by the reaction of sulfur dioxide with chlorine in the presence of activated carbon as a catalyst. Sulfuryl chloride is miscible with benzene, toluene, chloroform, CCl4, glacial acetic acid.

Let us discuss viscosity, molar mass, oxidation states, molar density etc. of sulfuryl chloride in this article.

Sulfuryl chloride IUPAC name

The IUPAC name of Sulfuryl Chloride is Sulfuryl Chloride.

Sulfuryl chloride chemical formula

The chemical formula of Sulfuryl Chloride is SO2Cl2.

Sulfuryl chloride CAS number

The CAS number of Sulfuryl Chloride is 7791-25-5.

Sulfuryl chloride ChemSpider ID

SO2Cl2 has the ChemSpider ID as 23050.

Sulfuryl chloride chemical classification

The chemical classification of SO2Cl2 is as follows-

  • SO2Cl2 is an acid halide.
  • SO2Cl2 is an inorganic compound.
  • SO2Cl2 exists in liquid state at room temperature.
  • The central atom S belongs to group 16.
sulfuryl chloride properties
Sulfuryl Chloride

Sulfuryl chloride molar mass

The molar mass of SO2Cl2 is 136.96 g/mol. The molar mass of S atom is 32.065 g/mol, Cl atom is 35.5 g/mol and O atom is 16.00 g/mol.

Sulfuryl chloride color

SO2Cl2 is colourless. It turns yellow upon standing on exposure to light or air.

Sulfuryl chloride viscosity

The viscosity of SO2Cl2 is 0.596 cP at 20 οC.

Sulfuryl chloride molar density

The molar density of SO2Cl2 is 1.67 g/cm3 at 20 οC.

Sulfuryl chloride melting point

The melting point of SO2Cl2 is -54.1 οC or 219.1 K.

Sulfuryl chloride boiling point

The boiling point of SO2Cl2 is 69.4 οC or 342.5 K.

Sulfuryl chloride state at room temperature

SO2Cl2 exists as colourless liquid state at the room temperature.

Sulfuryl chloride covalent bond

SO2Cl2 contains 6 covalent bonds. Each oxygen atom forms double bonds with Sulfur while each Cl atom forms a single bond.

Sulfuryl chloride covalent radius

Sulfur has a larger covalent radius of 105 pm. The covalent radius of Cl is 102 pm and the covalent radius of Oxygen is 53 pm.

Sulfuryl chloride electron configurations

Electronic configuration is the placing of electrons in atomic or molecular orbitals. Let us find out the electronic configuration of atoms of SO2Cl2 below.

The electronic configuration of Sulfur is [Ne] 3s2 3p4, chlorine [Ne] 3s2 3p5 and that of Oxygen is [He] 2s2 2p4.

Sulfuryl chloride oxidation state

The oxidation state of sulfur in SO2Cl2 is +6. The oxidation state of chlorine is -1 while the oxidation state of Oxygen is -2.

Sulfuryl chloride acidity/alkaline

SO2Cl2 is a strong acid. It is a volatile acid.

Is sulfuryl chloride odourless?

SO2Cl2 has a pungent odour.

Is sulfuryl chloride paramagnetic?

A paramagnetic substance weakly attracted by the magnetic field while a diamagnetic substance is repelled by the magnetic field. Let us discuss it.

SO2Cl2 is diamagnetic in nature because it does not contain any unpaired electrons and is repelled by the magnetic field.

Sulfuryl chloride hydrates

SO2Cl2 forms hydrates with the ice-cold water, SO2Cl2.15H2O. This hydrate of SO2Cl2 resembles camphor in appearance.

SO2Cl2 + 15H2O –> SO2Cl2.15H2O

Sulfuryl chloride crystal structure

SO2Cl2 crystal structure is tetrahedral.

Sulfuryl chloride polarity and conductivity

  • SO2Cl2 is polar compound because of the unequal charge distribution on the central atom Sulfur.
  • SO2Cl2 shows ionic conductivity.

Sulfuryl chloride reaction with acid   

SO2Cl2 is itself an acid so it will not react with acid of the same strength.

Sulfuryl chloride reaction with base

SO2Cl2 reacts with NaOH to form Na2SO4, NaCl and H2O.

SO2Cl2 + 4NaOH –> Na2SO4 + 2NaCl + 2H2O

Sulfuryl chloride reaction with oxide

SO2Cl2 reacts with calcium oxide to give calcium sulphate and calcium chloride.

SO2Cl2 + 2CaO –> CaSO4 + CaCl2

Sulfuryl chloride reaction with metal

SO2Cl2 reacts with Pt and converts Pt into chlorides. In some cases, the chloride formed depends on the reaction temperature.

SO2Cl2 + Pt –> PtCl2 + SO2


We conclude that SO2Cl2 is an inorganic compound, diamagnetic in nature, strong acid with a pungent smell that corrodes the metal.