1,2-Dichlorobenzene Identifiers CAS number ChemSpider UNII KEGG ChEBI ChEMBL Jmol-3D images Image 1
Properties Molecular formula C6H4Cl2 Molar mass 147.01 g/mol Density 1.30 g/cm³ Melting point
-17.03 °C, 256 K, 1 °F
180.5 °C, 454 K, 357 °F
Hazards MSDS http://www.sigmaaldrich.com/catalog/DisplayMSDSContent.do Ingestion hazard Toxic if swallowed Inhalation hazard Causes respiratory tract irritation Eye hazard Causes eye irritation Skin hazard Causes skin irritation Flash point 66 °C (what is: /?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
1,2-Dichlorobenzene, or orthodichlorobenzene (ODCB), is an organic compound with the formula C6H4Cl2. This colourless liquid is poorly soluble in water but miscible with most organic solvents. It is a derivative of benzene, consisting of two adjacent chlorine centers.
Production and uses
1,2-Dichlorobenzene is obtained as a side-product of the production of chlorobenzene:
- C6H5Cl + Cl2 → C6H4Cl2 + HCl
The reaction also affords the 1,4- and small amounts of the 1,3-isomer.
It is mainly used as a precursor to 1,2-dichloro-4-nitrobenzene, an intermediate in the synthesis of agrochemicals. In terms of niche applications, 1,2-dichlorobenzene is a versatile, high-boiling solvent. It is a preferred solvent for dissolving and working with fullerenes. It is an insecticide for termites and locust borers.
1,2-Dichlorobenzene is also used in softening and removing carbon-based contamination on metal surfaces.
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