Carbon tetraiodide

Carbon tetraiodide
	Carbon tetraiodide crystals (left); Solution in diethyl ether (right);
Names
	Preferred IUPAC name Tetraiodomethane
Identifiers
CAS Number	507-25-5 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1733108
ChemSpider	10055 ;
ECHA InfoCard	100.007.335
EC Number	208-068-5;
PubChem CID	10487;
RTECS number	FG4960000;
UNII	E22GNX36ZQ ;
CompTox Dashboard (EPA)	DTXSID0060145 ;
	InChI InChI=1S/CI4/c2-1(3,4)5 Key: JOHCVVJGGSABQY-UHFFFAOYSA-N ;
	SMILES IC(I)(I)I;
Properties
Chemical formula	CI4
Molar mass	519.629 g·mol−1
Appearance	Dark violet crystals
Density	4.32 g mL−1
Magnetic susceptibility (χ)	−136·10−6 cm3/mol
Structure
Crystal structure	Tetragonal
Molecular shape	Tetrahedral
Dipole moment	0 D
Thermochemistry
Heat capacity (C)	0.500 J K−1 g−1
Std enthalpy of; formation (ΔfH⦵298)	384.0–400.4 kJ mol−1
Std enthalpy of; combustion (ΔcH⦵298)	−794.4 to −778.4 kJ mol−1
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	toxic
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H335
Precautionary statements	P261, P305+P351+P338
Related compounds
Other anions	Carbon tetrafluoride ; Carbon tetrachloride ; Carbon tetrabromide
Other cations	Silicon tetraiodide ; Germanium tetraiodide ; Tin(IV) iodide
Related alkanes	Methane; Methyl iodide; Diiodomethane; Iodoform; Ethane; Ethyl iodide;
Related compounds	Pimagedine; Guanidine;
	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

Carbon tetraiodide is a tetrahalomethane with the molecular formula CI₄. Being bright red, it is a relatively rare example of a highly colored methane derivative. It is only 2.3% by weight carbon, although other methane derivatives are known with still less carbon.