Synonyms:phenylbenzene appearance:white or light yellow crystal content:99.5%min melting point: 68.0-71.0 DC burn remains:0.1%max Biphenyl is an aromatic hydrocarbon, molecule structure is composed of two six-sided carbon rings connected at one carbon site on each ring. Biphenyl is used as an intermediate for the production of a wide rang of organic compounds, as a heat transfer medium alone or with diphenyl ether in heating fluid, as dyestuff carrier for textiles and copying paper and as a solvent in pharmaceutical production. Biphenyl derivatives are used as an intermediate for the synthesis of organic compounds including pharmaceuticals,, antifungal agents, optical brightening agents and dyes. Biphenyl compounds also used in luminescence chemistry, spectrophotometric analysis, molecular chemistry, and as a stating material for organometalic-complexes.