Name | Biphenyl |
Synonyms | Biphenyl Diphenyl 1,1'-Biphenyl Diphenyl Mixture Distilled hydrodealkylized toluene Biphenyl rich aromatic hydrocarbons Aromatic hydrocarbons, biphenyl-rich |
CAS | 92-52-4 68409-73-4 |
EINECS | 270-059-7 |
InChI | InChI=1/C12H10/c1-3-7-11(8-4-1)12-9-5-2-6-10-12/h1-10H |
Molecular Formula | C12H10 |
Molar Mass | 154.2078 |
Density | 0.992 |
Melting Point | 68.5-71℃ |
Boling Point | 255℃ |
Flash Point | 113℃ |
Water Solubility | insoluble |
Vapor Presure | 0.0227mmHg at 25°C |
Refractive Index | 1.571 |
Physical and Chemical Properties | Characteristics of white or slightly yellow scaly crystals, with a unique flavor. solubility insoluble in water, acid and alkali, soluble in alcohol, ether, benzene and other organic solvents. |
Use | Engineering Plastics polysulfone raw materials, the preparation of three chlorine biphenyl, five chlorine biphenyl, as a heat carrier, preservatives, dyes, etc |
Hazard Symbols | Xi - Irritant N - Dangerous for the environment |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S23 - Do not breathe vapour. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 3077 |
Biphenyl(C12H10) is a colorless liquid with a sweet and aromatic odor. Its main properties include: low boiling point (255℃), volatile, highly flammable, soluble in organic solvents and inorganic acids.
Biphenyl has a wide range of applications. First of all, it is widely used as an organic solvent in the chemical industry, and plays an important role in solvent extraction, degreasing, and detergent preparation. Secondly, Biphenyl can also be used as a raw material and intermediate for a variety of chemical substances, for the synthesis of dyes, pharmaceuticals, plastics, rubber and other products. In addition, Biphenyl can also be used as a fuel additive, automobile coolant and plant protection agent components.
There are many ways to make Biphenyl, the most common is the cracking of coal tar. Through the coal tar cracking reaction, a mixed fraction containing Biphenyl can be obtained, and then through purification and separation technology, Biphenyl with higher purity can be obtained.
When using and handling Biphenyl, pay attention to its safety. Biphenyl is a flammable liquid that can cause a fire when exposed to a fire source or high temperature, so keep away from open flames, heat sources and static electricity. At the same time, Biphenyl vapor has a certain toxicity and has an irritating effect on the respiratory system, nervous system and skin. Therefore, appropriate protective equipment should be worn and a well-ventilated working environment should be ensured. In addition, Biphenyl will also cause damage to aquatic life, so should avoid discharge in water. When handling and storing Biphenyl, it should be operated in strict accordance with relevant safety operation specifications to avoid leakage and accidents.
white or yellowish scaly crystals with a unique flavor. Melting point 71 °c. Boiling point 255.9 °c. The relative density was 0.992. Refractive index 475. Flash point 113 °c. Insoluble in water, acid and alkali, soluble in alcohol, ether, benzene and other organic solvents. It is chemically similar to benzene and can be chlorinated, nitrated, sulfonated and hydrogenated.
in high temperature tar containing about 3.0%, after fractionation, can also be used as raw materials for benzene synthesis.
organic heat carrier is also the raw material of high quality insulation liquid; Used as plasticizer, preservative; Also used in the manufacture of dyes, engineering plastics and high energy fuels.