Tin (II) chloride - SnCl2

What is Tin (II) chloride?

SnCl2 in its solid form is a crystalline mass with chemical name Tin (II) chloride. It is also called Tin dichloride, or Dichlorotin, or Tin Protochloride, or Stannous chloride. It has a lone pair of electrons where the molecule in the gaseous phase is bent.

It appears as a white crystalline solid which is odourless. It is toxic when swallowed and irritates eyes and skin when comes in contact. It is widely used in the manufacturing of pharmaceuticals, as a tanning agent, and in the production of dyes.

Properties of Tin (II) chloride – SnCl2


Tin (II) chloride

Molecular weight of SnCl2

189.60 g/mol (anhydrous)

Density of Tin (II) chloride

3.95 g/cm3 (anhydrous)

Boiling point of Tin (II) chloride

623 °C

Melting point of Tin (II) chloride

247 °C

Tin (II) chloride structure – SnCl2

Structure of Tin (II) chloride

The exact mass and the monoisotopic mass of Tin dichloride is 189.84 g/mol. The number of hydrogen bond acceptors and the number of hydrogen bond donors equals to zero. This compound is canonicalized and has one covalently bonded unit only.

SnCl2 Uses (Tin (II) chloride)

  • Tin (II) chloride is used as a strong reducing agent.
  • Used in the manufacturing of pharmaceutical products.
  • Used in removing ink stains.
  • Used as n additive in lubricating oils.
  • Used as a catalyst.
  • Used to manufacture colour pigments.
  • Used in tin-plating of steel.
  • Used in radionuclide angiography.
  • Used as a mordant in textile dyeing.
  • Used to produce plastic polylactic acid.

Production of Tin (II) chloride

Anhydrous Dichlorotin is obtained by the treating dry hydrogen chloride gas with tin metal. The dihydrate is prepaid by using hydrochloric acid (HCl):

Sn (s) + 2 HCl (aq) → SnCl2 (aq) + H2 (g)

The dihydrate is dehydrated to anhydrous by treating with acetic anhydride.

Health hazards:

Tin Protochloride is toxic and corrosive but non-combustible compound. Inhaling, swallowing or skin contact with this compound can cause severe injuries or lead to death. In its molten form, it may result in severe burns on the skin and in eyes. When heated, it liberates corrosive, irritating, and toxic gases.

Learn more about the Structure, physical and chemical properties of SnCl2 from the experts at BYJU’S.

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