92-52-4

Product Details:

CasNo： 92-52-4

Molecular Formula： C12H10

Purity： 99%

Synonyms: BIPHENYL (DIPHENYL); tetrosinly; Xenene; Diphenyl Mixture; BIPHENYL PESTANAL

Melting point: 68-70°C (lit.)

Boiling point: 255°C (lit.)

Density: 0.992

Vapor density: 5.31 (vs air)

Vapor pressure: 9.46 mm Hg (115°C)

Refractive index: 1.475

Fp: 113°C

Solubility: Soluble in alcohol and ether

Form: Crystalline Powder, Crystals or Flakes

Color: White to faint yellow

Odor: pleasant odor

Water Solubility: insoluble

Stability: Stable. Combustible. Incompatible with strong oxidizing agents

Description:
Biphenyl is also called phenyl benzene, it is formed by two connected phenyl compounds, is white or colorless to light yellow crystal plate, industrial products is slightly yellow with special fragrance. The melting temperature is 69.2 ℃, boiling point is 69.2 ℃. Insoluble in water, but soluble in organic solvents. Commonly used for organic synthesis precursor, is one of the key components of the organic high temperature heating medium. Its derivatives include benzidine, diphenyl ether, eight bromine diphenyl ether, polychlorinated biphenyls, etc.

Natural biphenyl exists in coal tar, crude oil and natural gas, the mass fraction is 0.20% to 0.20% in coal tar, current preparation methods of biphenyl include coal tar extraction and chemical synthesis.
The chemical bond in the middle of biphenyls can rotate freely, but if there were bulky groups in the four orthos, restricts rotation and would produce resistance isomer. This type of compounds (such as BINAP) can be used as a chiral ligands. substituted biphenyl by Suzuki reaction and Ullmann coupling reactions.
Biphenyl is a kind of important organic raw materials, widely used in medicine, pesticides, dyes, liquid crystal materials, etc. Can be used in the synthesis of plasticizer, preservatives, can also be used to make fuel, engineering plastic and high energy fuel.

Chemical Properties:

Biphenyl is a white or slightly yellow scaly crystal, has a unique fragrance. Insoluble in water, acid and alkali, soluble in alcohol, ether, benzene and other organic solvents.

Uses:

Biphenyl is used in organic syntheses, heat transfer fluids, dye carriers, food preservatives, as an intermediate for polychlorinated biphenyls, and as a fungistat in the packaging of citrus fruits.
Biphenyl with high thermal stability and low vapor pressure, long often alone or with diphenyl ether and blend to used as heating medium. Component of biphenyl and terphenyl (including Biphenyl 13%, terphenyl 61%) can effectively absorb radiation, can be used as a heating medium for nuclear power plant. And three terphenyl([91-94-4]) is the byproduct of benzene pyrolysis to produce Biphenyl, according to the different reaction conditions, the proportion of the reaction product of biphenyl and terphenyl within a certain range of change, in general, Biphenyl: terphenyl=78:1. Biphenyl is used as a carrier, and its derivatives of ethyl biphenyl, diethyl biphenyl and triethyl biphenyl senior can be used as solvents, used in pressure sensitive dye solvent of carbon paper.

Biphenyl is used as an antifungal agent to preserve citrus fruit, in citrus wrappers to retard mold growth, in heat transfer fluids, in dye carriers for textiles and copying paper, as a solvent in pharmaceutical production, in optical brighteners, and as an intermediate for the production of a wide range of organic compounds.