57117-36-9

Basic information

• Product Name: 1,3,6,7-TETRACHLORODIBENZOFURAN
• Synonyms: 1,3,6,7-TETRACHLORODIBENZOFURAN;1,3,6,7-TCDF
• CAS NO: 57117-36-9
• Molecular Formula: C12H4Cl4O
• Molecular Weight: 305.97
• Mol File: 57117-36-9.mol
• Article Data: 2

Chemical Properties

• Boiling Point: 418.9°Cat760mmHg
• Flash Point: 207.1°C
• Appearance: /
• Density: 1.625g/cm³
• Vapor Pressure: 7.72E-07mmHg at 25°C
• Refractive Index: 1.713
• CAS DataBase Reference: 1,3,6,7-TETRACHLORODIBENZOFURAN(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3,6,7-TETRACHLORODIBENZOFURAN(57117-36-9)
• EPA Substance Registry System: 1,3,6,7-TETRACHLORODIBENZOFURAN(57117-36-9)

Safety Data

• Hazardous Substances Data: 57117-36-9(Hazardous Substances Data)

Usage

Description

1,3,6,7-Tetrachlorodibenzofuran is a chlorinated organic compound belonging to the family of dibenzofuran derivatives. It is characterized by the presence of four chlorine atoms at the 1, 3, 6, and 7 positions, which contribute to its chemical properties and potential applications.

Uses

Used in Environmental Testing and Research:
1,3,6,7-Tetrachlorodibenzofuran is used as a standard in environmental testing and research for various applications, including the fingerprinting of pesticides. It plays a crucial role in understanding the formation of dioxins during the decomposition of these pesticides and their reactions under UV light. This information is vital for assessing the environmental impact and potential health risks associated with pesticide use and dioxin exposure.

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

Upstream product

• 39485-83-1 2,2',4,4',6-pentachlorobiphenyl 
• 32598-10-0 2,3',4,4'-terachlorobiphenyl 
• 56558-17-9 2,3',4,4'6-pentachlorobiphenyl 
• 57117-42-7 1,2,3,6,7-pentachlorodibenzofuran 
• 83704-36-3 1,3,4,6,7-pentachlorodibenzofuran 

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.