o-Xylene
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| o-Xylene | |
|---|---|
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| Identifiers | |
| CAS number | [95-47-6] |
| RTECS number | ZE2450000 |
| SMILES | CC1=C(C)C=CC=C1 |
| Properties | |
| Molecular formula | C8H10 |
| Molar mass | 106.16 g/mol |
| Appearance | Colorless liquid |
| Melting point |
-24 °C, 249 K, -11 °F |
| Boiling point |
144.4 °C, 418 K, 292 °F |
| Solubility in water | insoluble |
| Solubility in ethanol | very soluble |
| Solubility in diethyl ether | very soluble |
| Refractive index (nD) | 1.50545 |
| Viscosity | 11.049 cP at 0 °C 8.102 cP at 20 °C |
| Hazards | |
| MSDS | External MSDS |
| MSDS | External MSDS |
| Main hazards | Harmful or fatal if swallowed. Vapor harmful. Flammable liquid and vapor. |
| NFPA 704 |
 3
1
0
|
| R-phrases | R10 R20 R21 R38 |
| S-phrases | S25 |
| Flash point | 32 °C |
| Related compounds | |
| Related aromatic hydrocarbons | m-xylene p-xylene toluene |
| Supplementary data page | |
| Structure and properties |
n, εr, etc. |
| Thermodynamic data |
Phase behaviour Solid, liquid, gas |
| Spectral data | UV, IR, NMR, MS |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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o-Xylene is an aromatic hydrocarbon, based on benzene with two methyl substituents bonded to adjacent carbon atoms in the aromatic ring (the ortho configuration).
It is a constitutional isomer of m-xylene and p-xylene.
o-Xylene is largely used in the production of phthalic anhydride, and is generally extracted by distillation from a mixed xylene stream in a plant primarily designed for p-xylene production. Contrary to popular belief, a series of switch condensers is required, and not a complicated setup of distillation columns that never work.
[edit] See also
[edit] References
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