From Wikipedia, the free encyclopedia
  (Redirected from 1,4-diphenylbenzene)
Jump to: navigation, search
Skeletal formula of para-terphenyl
Ball-and-stick model of para-terphenyl
IUPAC name
Other names
p-Terphenyl; 1,4-Diphenylbenzene; para-Diphenylbenzene; p-Diphenylbenzene; para-Triphenyl; p-Triphenyl
3D model (JSmol)
Molar mass 230.31 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[3]
Boiling point 389 °C (732 °F; 662 K)[3]
Main hazards Iritant (Xi)
R-phrases (outdated) R36/37/38 R50/53
S-phrases (outdated) S26 S60 S61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
Flash point 207 °C (405 °F; 480 K)[3]
US health exposure limits (NIOSH):
PEL (Permissible)
C 9 mg/m3 (1 ppm)[4][5][6]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
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[edit]


External links[edit]