34883-39-1

Basic information

• Product Name: 2,5-DICHLOROBIPHENYL
• Synonyms: PCB NO 9;2,5-DICHLOROBIPHENYL;2,5-PCB;BALLSCHMITER NO 9;BZNO 9;2,5-Dichloro-1,1'-biphenyl;Biphenyl, 2,5-dichloro-;PCB 9
• CAS NO: 34883-39-1
• Molecular Formula: C₁₂H₈Cl₂
• Molecular Weight: 223.1
• EINECS: 215-648-1
• Mol File: 34883-39-1.mol
• Article Data: 4

Chemical Properties

• Melting Point: 22.5°C
• Boiling Point: 289.78°C (rough estimate)
• Flash Point: 133.7 °C
• Appearance: /
• Density: 1.2490 (rough estimate)
• Vapor Pressure: 0.00167mmHg at 25°C
• Refractive Index: 1.5940 (rough estimate)
• Water Solubility: 1.116mg/L(25 oC)
• CAS DataBase Reference: 2,5-DICHLOROBIPHENYL(CAS DataBase Reference)
• NIST Chemistry Reference: 2,5-DICHLOROBIPHENYL(34883-39-1)
• EPA Substance Registry System: 2,5-DICHLOROBIPHENYL(34883-39-1)

Safety Data

• Hazard Codes: N
• Statements: 33-50/53
• Safety Statements: 35-60-61
• RIDADR: 2315
• HazardClass: 9
• PackingGroup: II
• Hazardous Substances Data: 34883-39-1(Hazardous Substances Data)

Usage

Description

2,5-Dichlorobiphenyl, a polychlorinated biphenyl (PCB) congener, is a chemical compound belonging to the class of dichlorobiphenyls. It is characterized by a p-dichlorobenzene structure, where one of the hydrogen atoms has been replaced by a phenyl group. 2,5-DICHLOROBIPHENYL has been widely studied due to its potential environmental and health impacts.

Uses

Used in Chemical Industry:
2,5-Dichlorobiphenyl is used as a raw material in the chemical industry for the production of various chemicals and plastics. Its unique structure and properties make it a valuable component in the synthesis of different compounds.
Used in Electrical Industry:
In the electrical industry, 2,5-Dichlorobiphenyl is utilized as a component in the manufacturing of capacitors and transformers. Its dielectric properties and thermal stability contribute to the performance and reliability of these electrical components.
Used in Environmental Research:
2,5-Dichlorobiphenyl is also used as a subject of study in environmental research. Scientists investigate its behavior in the environment, its potential to accumulate in the food chain, and its effects on human health and wildlife. This research helps to develop strategies for the safe handling, disposal, and remediation of PCB-contaminated sites.
Used in Analytical Chemistry:
As a representative of the PCB family, 2,5-Dichlorobiphenyl is used in analytical chemistry for the development and validation of analytical methods for detecting and quantifying PCBs in environmental and biological samples. This helps to monitor and control the presence of these potentially harmful compounds in the environment.

Synthesis Reference(s)

Synthesis, p. 709, 1984 DOI: 10.1055/s-1984-30945

InChI:InChI=1/C12H8Cl2/c13-10-6-7-12(14)11(8-10)9-4-2-1-3-5-9/h1-8H

Upstream product

• 120-82-1 1,2,4-Trichlorobenzene 
• 71-43-2 benzene 
• 1435-50-3 2-bromo-1,4-dichlorobenzene 
• 55720-44-0 2,3,5-trichlorobiphenyl 
• 55702-45-9 2,3,6-trichlorobiphenyl 
• 15862-07-4 2,4,5-trichlorobiphenyl 
• 29682-41-5 2,5-dichloroiodobenzene 
• 1679-18-1 4-Chlorophenylboronic acid 
• 16606-02-3 2,4',5-Trichlorobiphenyl 

Downstream Products

• 607-12-5 5-chloro-biphenyl-2-ol 
• 21345-13-1 6-chloro-[1,1'-biphenyl]-3-ol 
• 2051-61-8 m-chlorobiphenyl 
• 2051-60-7 2-chloro-1,1'-biphenyl 
• 92-52-4 biphenyl 
• 50-79-3 2,5-dichlorobenzoic acid 
• 827-52-1 1-phenyl-1-cyclohexane 

Relevant articles and documents

Regularities of Pd/C-catalyzed reduction of trichlorobiphenyls with 2-propanol in basic medium

Reduction of a series of trichlorobiphenyls with 2-propanol in basic medium catalyzed by Pd/C has been studied. Regioselectivity of the reduction has been determined. In the studied cases, the chlorine atom in para or meta positions of the more substituted ring has been more reactive. Using isotope labeling, it has been demonstrated that the reaction occurs via the stage of 2-propanol dehydration on palladium catalyst, followed by catalytic hydrogenation of the polychlorinated biphenyls.

Polychlorinated biphenyl reductive dechlorination by vitamin B12s: Thermodynamics and regiospecificity

Microbial reductive dechlorination reactions play an important role in determining the environmental fate of polychlorinated biphenyls (PCBs), especially for PCB congeners with more than four chlorines. Powerful chemical catalysts such as vitamin B12s provide an effective tool for the study of reductive dechlorination reactions. The reductive dechlorination of PCBs by titanium(III) citrate-reduced vitamin B12s was studied in batch reactors. Long-term experiments demonstrated reductive dechlorination of aqueous and sediment-sorbed 2,3,4,5,6-pentachlorobiphenyl (2,3,4,5,6-PeCB) to tetra-, tri-, di-, and monochlorobiphenyl products. Approximately 10% chlorine removal was observed in 36 days in aqueous experiments at 20°C; the sediment experiment showed 40% chlorine removal in 42 days at 30°C. Nearly all possible intermediates were produced and reductively dechlorinated, with no apparent accumulation of individual congeners. Short-term experiments were conducted to determine the pathway forvitamin B12s-catalyzed reductive dechlorination of aqueous 2,3,4,5,6-PeCB and its dechlorinated products; relative product distributions were measured for all possible tetra-and trichlorobiphenyl reductive dechlorination reactions. Theoretical product distributions based on free energies of formation agreed with observed product distributions for short-and long-term experiments. Reductive dechlorination was favored at positions with adjacent chlorines; on average, chlorines were removed equally from ortho, meta, and para positions.