57117-42-7

Basic information

• Product Name: 1,2,3,6,7-PENTACHLORODIBENZOFURAN
• Synonyms: 1,2,3,6,7-PENTACHLORODIBENZOFURAN;1,2,3,6,7-PCDF
• CAS NO: 57117-42-7
• Molecular Formula: C12H3Cl5O
• Molecular Weight: 340.42
• Mol File: 57117-42-7.mol
• Article Data: 24

Chemical Properties

• Boiling Point: 450.6°Cat760mmHg
• Flash Point: 226.3°C
• Appearance: /
• Density: 1.7g/cm³
• Vapor Pressure: 6.96E-08mmHg at 25°C
• Refractive Index: 1.715
• CAS DataBase Reference: 1,2,3,6,7-PENTACHLORODIBENZOFURAN(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,3,6,7-PENTACHLORODIBENZOFURAN(57117-42-7)
• EPA Substance Registry System: 1,2,3,6,7-PENTACHLORODIBENZOFURAN(57117-42-7)

Safety Data

• Hazardous Substances Data: 57117-42-7(Hazardous Substances Data)

Usage

Uses

1,2,3,6,7-Pentachlorodibenzofuran is a standard for environmental testing and research as well as the measure of PCB products on contaminant-free areas and trees and formation products due to UV light and sun exposure of pesticides.

InChI:InChI=1/C12H3Cl5O/c13-5-2-1-4-8-7(18-12(4)10(5)16)3-6(14)9(15)11(8)17/h1-3H

Upstream product

• 52663-71-5 2,2',3,3',4,5,5'-heptachlorobiphenyl 
• 191-24-2 Benzo[ghi]perylene 
• 191-07-1 Coronene 
• 132-64-9 dibenzofuran 
• 108-90-7 chlorobenzene 
• 127-18-4 1,1,2,2-tetrachloroethylene 
• 9004-34-6 cellulose 
• 95-95-4 2,4,5-trichlorophenol 
• 94-74-6 MCPA 

Downstream Products

• 83704-25-0 1,2,6,7-tetrachlorodibenzofuran 
• 83704-22-7 1,2,3,7-tetrachlorodibenzofuran 
• 57117-36-9 1,3,6,7-tetrachlorodibenzofuran 
• 83704-21-6 1,2,3,6-tetrachlorodibenzofuran 
• 57117-39-2 2,3,6,7-tetrachlorodibenzofuran 

Relevant articles and documents

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.

Removal of PCDD/Fs from Flue Gas by a Fixed-Bed Activated Carbon Filter in a Hazardous Waste Incinerator

The adsorption of polychlorinated dibenzodioxins and dibenzofurans (PCDD/Fs) by activated carbon (AC) was examined in a fixed-bed AC unit in a hazardous waste incinerator (IZAYDAS) in Turkey. Results showed that the removal efficiencies of PCDD/Fs decrease as the chlorination level increases, which was explained by the difference in gas/particle partitioning of the compounds. Since dioxins are tightly adsorbed by activated carbon, other flue gas constituents showed no clear effect on the dioxin removal. Adsorption kinetics indicated that the adsorption of volatile congeners and homologues fits well with Henry's law, possibly due to the higher gaseous fractions, while the correlation was lower for lowly volatile ones. PCDD/F congeners and homologues had a concentration value up to which no adsorption occurred, which could be attributed to the insufficient contact times at the low concentrations.

Polychlorinated dibenzo-p-dioxin/polychlorinated dibenzofuran releases into the atmosphere from the use of secondary fuels in cement kilns during clinker formation

The aim of this study was to evaluate the influence of using waste materials, such as tires or meat meal, as a secondary fuel during clinker production on the polychlorinated dibenzo-p-dioxin (PCDD)/polychlorinated dibenzofuran (PCDF) emission levels to the atmosphere. For this purpose, three different cement plants in Spain were chosen to conduct the project in different sampling episodes. Different materials were separately evaluated in each plant: the first plant included the addition of meat meal in the kiln, the second plant used rejected tires, and the third plant used a mixture of both. In all cases, PCDD/F emission values remained below the limit established by the European Union Directive of 0.1 ng I-TEQ/Nm3, with values ranging from 0.001 to 0.042 ng I-TEQ/Nm3. The major contribution to total TEQ in the majority of cases came from 2,3,7,8-tetrachlorodibenzofuran owing to its relatively higher levels and 2,3,4,7,8-pentachlorodibenzofuran because of its TEF of 0.5. The remaining 15 toxic congeners collectively provided only a minor contribution to TEQ. Furthermore, no marked differences were found compared with reported data obtained from Spanish cement kiln plants using conventional fuel. This fact indicates that the addition of used tires or meat meals had no effect on PCDD/ PCDF emission levels.