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Diiodomethane



Diiodomethane
IUPAC name Diiodomethane
Other names Methylene iodide, Methylene diiodide, Methyl diiodide
Identifiers
CAS number 75-11-6
PubChem 6346
EINECS number 200-841-5
RTECS number PA8575000
SMILES C(I)I
InChI InChI=1/CH2I2/c2-1-3/h1H2
Properties
Molecular formula CH2I2
Molar mass 267.84 g/mol
Appearance Light yellow to gold liquid with chloroform-like odour
Density 3.325 g/cm3
Melting point

6 °C (43 °F)

Boiling point

181 °C (358 °F) (decomp.)

Solubility in water 14 g/l at 20 °C
Hazards
EU classification Harmful (Xn)
NFPA 704
1
3
0
 
R-phrases R20/22
S-phrases S26, S27, S36/37/39
Flash point 113 °C
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Diiodomethane or methylene iodide is liquid halomethane insoluble in water, soluble in ether and alcohol. It has high refractive index of 1.741. Fresh diiodomethane is a colorless liquid. However, its exposition to light causes it to slowly decompose and deliberate iodine, which colours it brownish.

With its high specific gravity, it is used for the separation of minerals or for determination of specific gravity of mineral particles. Due its uncertain toxicity, it should be replaced with safer heavy liquids. It is also used as a solvent and a chemical intermediate.

See also
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Diiodomethane". A list of authors is available in Wikipedia.
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