92341-04-3

Basic information

• Product Name: Dibenzofuran, 1,3,4,8-tetrachloro-
• Synonyms: Dibenzofuran, 1,3,4,8-tetrachloro-
• CAS NO: 92341-04-3
• Molecular Formula: C12H4 Cl4 O
• Molecular Weight: 0
• Mol File: 92341-04-3.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 415.4°Cat760mmHg
• Flash Point: 205.1°C
• Appearance: /
• Density: 1.625g/cm³
• Vapor Pressure: 9.93E-07mmHg at 25°C
• Refractive Index: 1.713
• CAS DataBase Reference: Dibenzofuran, 1,3,4,8-tetrachloro-(CAS DataBase Reference)
• NIST Chemistry Reference: Dibenzofuran, 1,3,4,8-tetrachloro-(92341-04-3)
• EPA Substance Registry System: Dibenzofuran, 1,3,4,8-tetrachloro-(92341-04-3)

Safety Data

• Hazardous Substances Data: 92341-04-3(Hazardous Substances Data)

Usage

Uses

1,3,4,8-Tetrachlorodibenzofuran isa standard used for environmental testing and research used in the study of dioxin contaminants in natural lakes and rivers.

InChI:InChI=1/C12H4Cl4O/c13-5-1-2-9-6(3-5)10-7(14)4-8(15)11(16)12(10)17-9/h1-4H

Upstream product

• 37680-73-2 2,2',4,5,5'-Pentachlorobiphenyl 
• 60145-21-3 2,2',4,5',6-pentachlorobiphenyl 

Relevant articles and documents

Isomer distributions of polychlorinated dibenzo-p-dioxins/dibenzofurans formed during de novo synthesis on incinerator fly ash

Polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF) emitted from municipal waste incinerators appear to have a chlorination pattern that is quite constant across various samples and conditions. This suggested that these patterns may be controlled by thermodynamic properties of the individual PCDD/F congeners, such as the free Gibbs energy of formation (Δg°(f,T)). This would make prediction of the isomer composition of a particular sample (and hence its TEQ value) possible, based on values of ΔG°(f,T). A laboratory scale study was carried out with activated carbon on fly ash as the source of PCDD/F formation. Although it was found that the isomer distributions within homologues were independent of the reaction time (proof of thermodynamic control), other observations (lack of equilibrium/isomerization between isomers and lack of similarity between isomer distributions measured and predicted by ΔG°(f,T)) contradicted the possibility of thermodynamic control. Hence, this study could not confirm that de novo formation of PCDD/F could explain thermodynamically controlled isomer distributions in incinerators. Some recommendations for further work- time-based studies with precursors, isomerization studies with single congeners, and more data on ΔG°(f,T) values of PCDD/F-were made. Polychlorinated dibenzo-p-dioxins (PCDD) and dibenzofurans (PCDF) emitted from municipal waste incinerators appear to have a chlorination pattern that is quite constant across various samples and conditions. This suggested that these patterns may be controlled by thermodynamic properties of the individual PCDD/F congeners, such as the free Gibbs energy of formation (ΔG°f,T). This would make prediction of the isomer composition of a particular sample (and hence its TEQ value) possible, based on values of ΔG°f,T. A laboratory scale study was carried out with activated carbon on fly ash as the source of PCDD/F formation. Although it was found that the isomer distributions within homologues were independent of the reaction time (proof of thermodynamic control), other observations (lack of equilibrium/isomerization between isomers and lack of similarity between isomer distributions measured and predicted by ΔG°f,T) contradicted the possibility of thermodynamic control. Hence, this study could not confirm that de novo formation of PCDD/F could explain thermodynamically controlled isomer distributions in incinerators. Some recommendations for further work - time-based studies with precursors, isomerization studies with single congeners, and more data on ΔG°f,T values of PCDD/F - were made.