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| Names | |
|---|---|
| Preferred IUPAC name 11,21:24,31-Terphenyl[1] | |
| Other names 1,1′:4′,1″-Terphenyl[1] p-Terphenyl 1,4-Diphenylbenzene para-Diphenylbenzene p-Diphenylbenzene para-Triphenyl p-Triphenyl | |
| Identifiers | |
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3D model (JSmol) | |
| 1908447 | |
| ChEBI | |
| ChEMBL | |
| ChemSpider |
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| ECHA InfoCard | 100.043.146 |
| EC Number |
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| RTECS number |
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| UNII |
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| Properties | |
| C18H14 | |
| Molar mass | 230.310 g·mol−1 |
| Appearance | White powder[2] |
| Density | 1.24 g/cm3 |
| Melting point | 212 to 214 °C (414 to 417 °F; 485 to 487 K)[2] 212-213 °C[4] |
| Boiling point | 389 °C (732 °F; 662 K)[4] |
| Insoluble[2] | |
Refractive index (nD) | 1.65[3] |
| Hazards | |
| GHS labelling: | |
  | |
| Warning | |
| H315,H319,H335,H400 | |
| P261,P264,P271,P273,P280,P302+P352,P304+P340,P305+P351+P338,P312,P321,P332+P313,P337+P313,P362,P391,P403+P233,P405,P501 | |
| NFPA 704 (fire diamond) | |
| Flash point | 207 °C (405 °F; 480 K)[4] |
| NIOSH (US health exposure limits): | |
PEL (Permissible) | C 9 mg/m3 (1 ppm)[5][6][7] |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Terphenyls are a group ofaromatic hydrocarbons. Also known asdiphenylbenzenes ortriphenyls, they consist of a centralbenzene ring substituted with twophenyl groups. There are threesubstitution patterns:ortho-terphenyl,meta-terphenyl, andpara-terphenyl. Commercial grade terphenyl is generally a mixture of the threeisomers. This mixture is used in the production ofpolychlorinated terphenyls, which were formerly used as heat storage and transfer agents.[2]
p-Terphenyl derivatives are found in various fungi and bacteria. One example isatromentin, a pigment found in some mushrooms. These naturalp-terphenyls are better described as diphenylquinones or diphenylhydroquinones. Some m-terphenyl compounds occur in plants.[8]
