Aluminium chloride
IUPAC name	aluminium chloride
Other names	aluminium(III) chloride aluminum trichloride
Identifiers
CAS number	7446-70-0
PubChem	24012
ChEBI	CHEBI:30114
RTECS number	BD0530000
SMILES	Cl[Al](Cl)Cl
InChI InChI=1/Al.3ClH/h;3*1H/q+3;;;/p-3
Gmelin Reference	1876
Properties
Molecular formula	AlCl3
Molar mass	133.341 g/mol (anhydrous) 241.432 g/mol (hexahydrate)
Appearance	white or pale yellow solid, hygroscopic
Density	2.48 g/cm3 (anhydrous) 2.398 g/cm3 (hexahydrate)
Melting point	192.6 °C, 466 K, 379 °F
Boiling point
Solubility in water	439 g/l (0 °C) 449 g/l (10 °C) 458 g/l (20 °C) 466 g/l (30 °C) 473 g/l (40 °C) 481 g/l (60 °C) 486 g/l (80 °C) 490 g/l (100 °C)
Solubility	soluble in hydrogen chloride, ethanol, chloroform, carbon tetrachloride slightly soluble in benzene
Vapor pressure	133.3 Pa (99 °C) 13.3 kPa (151 °C)
Viscosity	0.35 cP (197 °C) 0.26 cP (237 °C)
Structure
Crystal structure	Monoclinic, mS16
Space group	C12/m1, No. 12
Lattice constant	a = 0.591 nm, b = 0.591 nm, c = 1.752 nm
Coordination geometry	Octahedral (solid) Tetrahedral (liquid)
Molecular shape	Trigonal planar (monomeric vapour)
Thermochemistry
Std enthalpy of formation ΔfHo298	−704.2 kJ/mol
Standard molar entropy So298	109.3 J/mol·K
Specific heat capacity, C	91.1 J/mol·K
Pharmacology
ATC code
Hazards
NFPA 704	0 3 2
U.S. Permissible exposure limit (PEL)	none
Related compounds
Other anions	Aluminium fluoride Aluminium bromide Aluminium iodide
Other cations	Boron trichloride Gallium trichloride Indium(III) chloride Magnesium chloride
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Aluminium chloride (AlCl₃), is a chemical compound. It is a white or yellow crystalline solid. It melts at a low temperature. It is made by reacting aluminium oxide with hydrochloric acid. The anhydrous (without water) form may be made by reacting aluminium and chlorine. It is used in the making of chemicals. It is also used in deodorants. It can cause slight irritation. view more...