What is the common name for 1,2-dimethylbenzene?
The common name for 1,2-dimethylbenzene is o-xylene (or ortho-xylene).
Other names: o-Xylene; 1,2-xylene; o-dimethylbenzene.
1,2-dimethylbenzene CAS 95-47-6 is a precursor to terephthalic acid and dimethyl terephthalate, both monomers used in the production of polyethylene terephthalate (PET) plastic bottles and polyester clothing. Insoluble in water, o-Xylene can be miscible in ethanol, ether, chloroform and other organic solvents.
1,2-dimethylbenzene Properties
| Physical Properties | |
| Molecular weight | 106.17 |
| Boiling point | 144.41°C |
| Vapor pressure | 6 Torr at 20°C |
| Freezing point | -25.18°C |
| Refractive index | 1.5054 at 20°C |
| Density | 0.8802 g/mL (7.346 lb/gal) at 20°C |
| 0.8760 g/mL (7.311 lb/gal) at 25°C | |
| Dielectric constant | 2.57 at 20°C |
| Dipole moment | 0.45 D at 25°C |
| Solvent group | 7 |
| Polarity index (P') | 2.5 |
| Eluotropic value on alumina | 0.26 |
| Viscosity | 0.81 cP at 20°C |
| Surface tension | 30.03 dyn/cm at 20°C |
| Solubility in water | 0.018% at 25°C |
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