Aluminium monochloride

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Aluminium monochloride
CAS number 13595-81-8 YesY
PubChem 5359282
ChemSpider 4514257 YesY
ChEBI CHEBI:30131 YesY
Jmol-3D images Image 1
Molecular formula AlCl
Molar mass 62.43 g mol−1
227.95 J K-1 mol-1
-51.46 kJ mol-1
Related compounds
Related compounds aluminium monofluoride
gallium monofluoride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Aluminium monochloride is the metal halide with the formula AlCl. This compound is produced as a step in the Alcan process to smelt aluminium from an aluminium-rich alloy. When the alloy is placed in a reactor that is heated to 1,300°C and mixed with aluminium trichloride, a gas of aluminium monochloride is produced.[2]

2[Al]{alloy} + AlCl3{gas} -> 3AlCl{gas}

It then disproportionates into aluminium melt and aluminium trichloride upon cooling to 900°C.

This molecule has been detected in the interstellar medium, where molecules are so dilute that intermolecular collisions are unimportant.[3]


  1. ^ "chloridoaluminium (CHEBI:30131)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute. 
  2. ^ Totten, George E.; MacKenzie, D. Scott (2003). Handbook of Aluminum. CRC Press. ISBN 0-8247-0896-2. 
  3. ^ J. Cernicharo, M. Guelin (1987). "Metals in IRC+10216 - Detection of NaCl, AlCl, and KCl, and tentative detection of AlF". Astronomy and Astrophysics 183 (1): L10–L12. Bibcode:1987A&A...183L..10C.