35693-99-3

Basic information

• Product Name: 2,2',5,5'-TETRACHLOROBIPHENYL
• Synonyms: BALLSCHMITER NO 52;BZ NO 52;2,2',5,5'-TETRACHLOROBIPHENYL;2,2',5,5'-PCB;NO 52;PCB-52;PCB NO 52;2,2',5,5'-Tetrachlorobiphenyl-d3
• CAS NO: 35693-99-3
• Molecular Formula: C₁₂H₆Cl₄
• Molecular Weight: 291.99
• EINECS: 208-759-1
• Mol File: 35693-99-3.mol
• Article Data: 8

Chemical Properties

• Melting Point: 87℃
• Boiling Point: 374.95°C (rough estimate)
• Flash Point: 4 °C
• Appearance: /
• Density: 1.4420 (rough estimate)
• Refractive Index: 1.6120 (rough estimate)
• Storage Temp.: 2-8°C
• Water Solubility: 109.5ug/L(25 oC)
• BRN: 2053828
• CAS DataBase Reference: 2,2',5,5'-TETRACHLOROBIPHENYL(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2',5,5'-TETRACHLOROBIPHENYL(35693-99-3)
• EPA Substance Registry System: 2,2',5,5'-TETRACHLOROBIPHENYL(35693-99-3)

Safety Data

• Hazard Codes: N,Xn,F
• Statements: 33-50/53-67-65-38-11
• Safety Statements: 35-60-61-62-16
• RIDADR: 2315
• WGK Germany: 3
• RTECS: DV8660000
• HazardClass: 9
• PackingGroup: II
• Hazardous Substances Data: 35693-99-3(Hazardous Substances Data)

Usage

Description

2,2',5,5'-TETRACHLOROBIPHENYL, also known as a tetrachlorobiphenyl, is an organic compound belonging to the class of polychlorinated biphenyls (PCBs). It consists of a biphenyl molecule in which the hydrogens at the 2 and 5 positions of each benzene ring are replaced by chlorine atoms. 2,2',5,5'-TETRACHLOROBIPHENYL has been widely used in various industrial applications due to its unique properties.

Uses

Used in Chemical Industry:
2,2',5,5'-TETRACHLOROBIPHENYL is used as a starting material for the synthesis of various chemical compounds, including flame retardants, due to its stability and resistance to combustion.
Used in Electrical Industry:
In the electrical industry, 2,2',5,5'-TETRACHLOROBIPHENYL is used as an insulating fluid in high-voltage equipment, such as transformers and capacitors, because of its high dielectric strength and thermal stability.
Used in Plastics and Rubber Industry:
2,2',5,5'-TETRACHLOROBIPHENYL is used as an additive in the plastics and rubber industry to enhance the mechanical properties and flame retardancy of the materials.
Used in Heat Exchange Systems:
Due to its high thermal stability and low volatility, 2,2',5,5'-TETRACHLOROBIPHENYL is used as a heat transfer fluid in industrial heat exchange systems, particularly in those operating at high temperatures.

Upstream product

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Downstream Products

• 2051-60-7 2-chloro-1,1'-biphenyl 
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Relevant articles and documents

Sterically controlled C-H/C-H homocoupling of arenes: Via C-H borylation

A mild one-pot protocol for the synthesis of symmetrical biaryls by sequential Ir-catalyzed C-H borylation and Cu-catalyzed homocoupling of arenes is described. The regiochemistry of the biaryl formed is sterically controlled as dictated by the C-H borylation step. The methodology is also successfully extended to heteroarenes. Some of the products obtained by this approach are impossible to obtain via the Ullmann or the Suzuki coupling protocols. Finally, we have shown a one-pot sequence describing C-H borylation/Cu-catalyzed homocoupling/Pd-catalyzed Suzuki coupling to obtain π-extended arene frameworks.

METHOD FOR SEPARATING AND CLEANING UP POLYHALOGENATED BIPHENYLS

The method for separating and cleaning up polyhalogenated biphenyls (PHBs) is characterized by comprising the following three steps: (1) the step of bringing a sample containing PHBs into contact with a fibrous activated carbon; (2) the step of washing the fibrous activated carbon with hexanes; and (3) the step of eluting PHBs from the fibrous activated carbon.

Removal of dioxins and related aromatic hydrocarbons from flue gas streams by adsorption and catalytic destruction

The dioxin removing capacity of the shell dedioxin system (SDDS a - Ti/V oxidative type catalyst) has been tested using the Umefa lab-scale incinerator over the temperature range 100 -230°C and at space velocities of 8000 and 40,000 h-1. Other analogous organic compounds, such as PCBs, PAHs, chlorobenzenes and chlorophenols have also been investigated. Results show a high degree of dioxin removal already at 100°C (82%), which occurs mainly by adsorption. When the temperature is raised a transition towards destruction is seen and at 150°C, gas hour space velocity (GHSV) 8000 and at 230°C, GHSV 40,000 virtually all removal is by destruction. High PCDD/F destruction efficiencies are reported (> 99.9%, based on I-TEQ); the other dioxin-related species and PAHs are also removed and destroyed to a significant extent. The SDDS has proved to be an effective means of destroying organic compounds in the gas phase, particularly dioxins, at temperatures as low as 150°C.