32598-14-4

Usage

Uses

2'',3'',4,4'',5-Pentachlorobiphenyl is a toxic organic pollutant.

Safety Profile

A poison by intraperitoneal route. When heated to decomposition it emits toxic vapors of Clí.

Upstream product

• 62720-28-9 1,2,3-trichloro-4-iodobenzene 
• 20555-91-3 3,4-dichloroiodobenzene 
• 3209-22-1 1,2-Dichloro-3-nitrobenzene 
• 95-76-1 m,p-dichloroaniline 
• 120-82-1 1,2,4-Trichlorobenzene 
• 132639-87-3 3,3',4,4'-tetrachloro-2-nitrobiphenyl 

Relevant academic research and scientific papers

Reactivity features of polychlorobiphenyl congeners in the nucleophilic substitution reactions

Groups of congeners and individual congeners of polychlorobiphenyls contributing to the composition of the technical mixture "Sovol" (PCB 60, PCB 64, PCB 70, PCB 74, PCB 97, PCB 101, PCB 105, PCB 110, PCB 118, PCB 138, PCB 149, PCB 156, and PCB 163) were

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.

Emission factors and importance of PCDD/Fs, PCBs, PCNs, PAHs and PM 10 from the domestic burning of coal and wood in the U.K.

This paper presents emission factors (EFs) derived for a range of persistent organic pollutants (POPs) when coal and wood were subject to controlled burning experiments, designed to simulate domestic burning for space heating. A wide range of POPs were emitted, with emissions from coal being higher than those from wood. Highest EFs were obtained for particulate matter, PM10, (～ 10 g/kg fuel) and polycyclic aromatic hydrocarbons (～ 100 mg/ kg fuel for ΣPAHs). For chlorinated compounds, EFs were highest for polychlorinated biphenyls (PCBs), with polychlorinated naphthalenes (PCNs), dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) being less abundant. EFs were on the order of 1000 ng/kg fuel for ΣPCBs, 100s ng/ kg fuel for ΣPCNs and 100 ng/kg fuel for ΣPCDD/Fs. The study confirmed that mono- to trichlorinated dibenzofurans, Cl1,2,3DFs, were strong indicators of low temperature combustion processes, such as the domestic burning of coal and wood. It is concluded that numerous PCB and PCN congeners are routinely formed during the combustion of solid fuels. However, their combined emissions from the domestic burning of coal and wood would contribute only a few percent to annual U.K. emission estimates. Emissions of PAHs and PM 10 were major contributors to U.K. national emission inventories. Major emissions were found from the domestic burning for Cl1,2,3DFs, while the contribution of PCDD/F-ΣTEQ to total U.K. emissions was minor.

Effects of oxygen on formation of PCB and PCDD/F on extracted fly ash in the presence of carbon and cupric salt

The effect of oxygen-nitrogen atmosphere (N2 + 10%O2, N2 + 1%O2 and 99.999% N2) on the formation of PCB, PCDD and PCDF by the de novo synthetic reactions in the system consisting of extracted fly ash

Physical, spectral and chromatographic properties of all 209 individual PCB congeners

Through the use of two capillary GC columns: 40% octadecyl/ 15% phenyl methyl siloxane and 50% phenyl methyl siloxane, it was possible to separate 201 PCB congeners with only four unresolved pairs. The data compiled in this study for all 209 congeners will aid in the identification of selected individual components of these environmental pollutants. The use of this data also presents the opportunity for the improved quantification of the commercial PCB formulations. -from Authors

Synthesis of 14C-Labelled and Unlabelled Coplanar Polychlorinated Biphenyls (PCBs)

A modified Ullman reaction is described for synthesis of the three most toxic coplanar PCBs, 3,3',4,4'-tetrachlorobiphenyl, 3,3',4,4',5-pentachlorobiphenyl and 3,3',4,4',5,5'-hexachlorobiphenyl. 3,3',4',5,5'-Pentachlorobiphenyl and one ortho-substituted PCB, 2,3,3',4,4'-pentachlorobiphenyl, were also prepared.Methods for the preparation of unlabelled 3,3',4,4',5-pentachlorobiphenyl and 3,3',4,4',5-pentachlorobiphenyl are presented.Three isomeric tetrachloro(nitro)biphenyls were isolated and characterized as intermediates in the synthesis of 3,3',4,4',5- and 2,3,3',4,4'-pentachlorobiphenyl via the Ponomarenko reaction.The Cadogan diaryl coupling method was also used for synthesis of 3,3',4,4',5-pentachlorobiphenyl.