Aluminium carbide

Aluminium carbide
Names
	Preferred IUPAC name Aluminium carbide
	Other names Tetraaluminium tricarbide; Aluminium methanide;
Identifiers
CAS Number	1299-86-1 ; 12656-43-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	21241412 ;
ECHA InfoCard	100.013.706
EC Number	215-076-2;
MeSH	Aluminum+carbide
PubChem CID	16685054;
UN number	1394
CompTox Dashboard (EPA)	DTXSID10107594 ;
	InChI InChI=1S/3C.4Al/q3-4;4+3 Key: TWHBEKGYWPPYQL-UHFFFAOYSA-N ; InChI=1/3C.4Al/q3-4;4+3 Key: TWHBEKGYWPPYQL-UHFFFAOYAR;
	SMILES [Al+3].[Al+3].[Al+3].[Al+3].[C-4].[C-4].[C-4];
Properties
Chemical formula	Al4C3
Molar mass	143.95853 g/mol
Appearance	colorless (when pure) hexagonal crystals
Odor	odorless
Density	2.36 g/cm3
Melting point	2,100 °C (3,810 °F; 2,370 K)
Boiling point	decomposes at 1400 °C
Solubility in water	reacts to make natural gas
Structure
Crystal structure	Rhombohedral, hR21, space group
Space group	R3m（No. 166）
Lattice constant	a = 0.3335 nm, b = 0.3335 nm, c = 0.85422 nm α = 78.743°, β = 78.743°, γ = 60°
Thermochemistry
Heat capacity (C)	116.8 J/(mol·K)
Std molar; entropy (S⦵298)	88.95 J/(mol·K)
Std enthalpy of; formation (ΔfH⦵298)	−209 kJ/mol
Gibbs free energy (ΔfG⦵)	−196 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H261, H315, H319, H335
Precautionary statements	P231+P232, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P402+P404, P403+P233, P405, P501
NFPA 704 (fire diamond)	2 2 2 W
Safety data sheet (SDS)	Fisher Scientific
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Aluminium carbide is a chemical compound with the chemical formula Al₄C₃. It is a carbide of aluminium. It has the appearance of pale yellow to brown crystals. It is stable up to 1400 °C. It decomposes in water with the production of methane.

Names

Preferred IUPAC name Aluminium carbide
Other names Tetraaluminium tricarbide Aluminium methanide
Identifiers
CAS Number	1299-86-1^Y 12656-43-8^N
3D model (JSmol)	Interactive image
ChemSpider	21241412^Y
ECHA InfoCard	100.013.706
EC Number	215-076-2
MeSH	Aluminum+carbide
PubChem CID	16685054
UN number	1394
CompTox Dashboard (EPA)	DTXSID10107594
InChI InChI=1S/3C.4Al/q3-4;4+3^Y Key: TWHBEKGYWPPYQL-UHFFFAOYSA-N^Y InChI=1/3C.4Al/q3-4;4+3 Key: TWHBEKGYWPPYQL-UHFFFAOYAR
SMILES [Al+3].[Al+3].[Al+3].[Al+3].[C-4].[C-4].[C-4]
Properties
Chemical formula	Al₄C₃
Molar mass	143.95853 g/mol
Appearance	colorless (when pure) hexagonal crystals
Odor	odorless
Density	2.36 g/cm³
Melting point	2,100 °C (3,810 °F; 2,370 K)
Boiling point	decomposes at 1400 °C
Solubility in water	reacts to make natural gas
Structure
Crystal structure	Rhombohedral, hR21, space group
Space group	R3m（No. 166）
Lattice constant	a = 0.3335 nm, b = 0.3335 nm, c = 0.85422 nm α = 78.743°, β = 78.743°, γ = 60°
Thermochemistry
Heat capacity (C)	116.8 J/(mol·K)
Std molar entropy (S^⦵₂₉₈)	88.95 J/(mol·K)
Std enthalpy of formation (Δ_fH^⦵₂₉₈)	−209 kJ/mol
Gibbs free energy (Δ_fG^⦵)	−196 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H261, H315, H319, H335
Precautionary statements	P231+P232, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P370+P378, P402+P404, P403+P233, P405, P501
NFPA 704 (fire diamond)	2 2 2 W
Safety data sheet (SDS)	Fisher Scientific
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is ^YN ?) Infobox references