Chemistry informtion about Carbon Tetraiodide (CAS NO.507-25-5) is:
IUPAC Name: Pentyl nitrite
Synonyms: Tert-Nitrooctane;Nitrous Acid N-Pentyl Ester;N-Pentyl Nitrite;Pentyl Nitrite;N-Amyl Nitrite;Nitramyl;Nitrous Acid, Pentyl Ester;Nitrousacid,Pentylester
MF: CI₄
MW: 519.63
EINECS: 208-068-5
Melting Point: 168 °C (dec.)(lit.)
Density: 4.316 g/cm³
Flash Point: 176.5 °C
Boiling Point: 329.2 °C at 760 mmHg
Vapour Pressure: 0.000346 mmHg at 25°C
Enthalpy of Vaporization: 54.89 kJ/mol
Storage temp.: 2-8°C
Sensitive: Moisture & Light Sensitive
Merck: 14,1818
BRN: 1733108 
Following is the molecular structure of Carbon Tetraiodide (CAS NO.507-25-5) is:

 Carbon Tetraiodide (CAS NO.507-25-5) is used as an iodination reagent, often upon reaction with base.Ketones are converted to 1,1-diiodoethenes upon treatment with PPh₃ and CI₄. Alcohols are converted in and to iodide, by a mechanism similar to the Appel reaction. In an Appel reaction carbon tetrachloride is used to generate the chloride from alcohols.

Raw materials: Aluminium chloride --> Carbon tetrachloride --> Iodoethane

Reported in EPA TSCA Inventory.

Poison by intravenous route. See also IODOFORM. Explodes on contact with bromine trifluoride. Mixtures with lithium particles are impact-sensitive explosives. Vigorous reaction with BrF₂. When heated to decomposition it emits toxic fumes of I⁻.
Hazard Codes:
Xi
Risk Statements:
R36/37/38:Irritating to eyes, respiratory system and skin. 
Safety Statements:
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
RIDADR: 2811
WGK Germany: 3
RTECS: FG4960000
F:
F 8: Photosensitive.
F 10: Keep under argon.
F 21: Sensitive to humidity. 
HazardClass: 6.1
PackingGroup: III

 Carbon Tetraiodide (CAS NO.507-25-5) is CI4, a tetrahalomethane. Being bright red, it is a relatively rare example of a highly colored methane derivative. It is only 2% by weight carbon, although other methane derivatives are known with still less carbon.