Terphenyl

para-Terphenyl
Names
IUPAC name
1,4-Diphenylbenzene
Other names
p-Terphenyl; 1,4-Diphenylbenzene; para-Diphenylbenzene; p-Diphenylbenzene; para-Triphenyl; p-Triphenyl
Identifiers
92-94-4 (para) Yes
92-06-8 (meta) 
84-15-1 (ortho) 
26140-60-3 (unspecified) 
Jmol-3D images Image
PubChem 7115
Properties
Molecular formula
 C18H14
Molar mass 230.30 g·mol−1
Appearance White powder[1]
Density 1.24 g/cm3
Melting point 212 to 214 °C (414 to 417 °F; 485 to 487 K)[1]
212-213 °C[2]
Boiling point 389 °C (732 °F; 662 K)[2]
Insoluble[1]
Hazards
Main hazards Iritant (Xi)
R-phrases R36/37/38 R50/53
S-phrases S26 S60 S61
NFPA 704
Flammability code 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g., canola oil Health code 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g., chloroform Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
1
2
0
Flash point 207 °C (405 °F; 480 K)[2]
US health exposure limits (NIOSH):
C 9 mg/m3 (1 ppm)[3][4][5]
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Terphenyls are a group of closely related aromatic hydrocarbons. Also known as diphenylbenzenes or triphenyls, they consist of a central benzene ring substituted with two phenyl groups. The three isomers are ortho-terphenyl, meta-terphenyl, and para-terphenyl. Commercial grade terphenyl is generally a mixture of the three isomers. This mixture is used in the production of polychlorinated terphenyls, which were formerly used as heat storage and transfer agents.[1]

p-Terphenyl is the most common isomer. It is used as a laser dye and a sunscreen ingredient.[1]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 p-Terphenyl at chemicalland21.com
  2. ↑ 2.0 2.1 2.2 p-Terphenyl at Sigma-Aldrich
  3. ↑ "NIOSH Pocket Guide to Chemical Hazards #0591". National Institute for Occupational Safety and Health (NIOSH).
  4. ↑ "NIOSH Pocket Guide to Chemical Hazards #0592". National Institute for Occupational Safety and Health (NIOSH).
  5. ↑ "NIOSH Pocket Guide to Chemical Hazards #0593". National Institute for Occupational Safety and Health (NIOSH).

External links