40321-76-4

Basic information

• Product Name: 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN
• Synonyms: 1,2,3,7,8-pentachloro-dibenzo-p-dioxi;1,2,3,7,8-Pentachlorooxanthrene;Dibenzo-p-dioxin, 1,2,3,7,8-pentachloro-;1,2,3,7,8-PENTACHLORODIBENZODIOXIN;1,2,3,7,8-PECDD;1,2,3,7,8-PENTACHLORODIBENZO-PARA-DIOXIN;1,2,3,7,8-PCDD;1,2,3,7,8-PNCDD
• CAS NO: 40321-76-4
• Molecular Formula: C₁₂H₃Cl₅O₂
• Molecular Weight: 356.41602
• Product Categories: Aromatics;Heterocycles
• Mol File: 40321-76-4.mol
• Article Data: 12

Chemical Properties

• Melting Point: 206°C (estimate)
• Boiling Point: 442.63°C (rough estimate)
• Flash Point: 174°C
• Appearance: /
• Density: 1.7800 (estimate)
• Vapor Pressure: 8.14E-08mmHg at 25°C
• Refractive Index: 1.6610 (estimate)
• CAS DataBase Reference: 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN(40321-76-4)
• EPA Substance Registry System: 1,2,3,7,8-PENTACHLORODIBENZO-P-DIOXIN(40321-76-4)

Safety Data

• RIDADR: 2811
• HazardClass: 6.1(a)
• PackingGroup: I
• Hazardous Substances Data: 40321-76-4(Hazardous Substances Data)

Usage

Safety Profile

Poison by ingestion. Questionable carcinogen. When heated to decomposition it emits toxic fumes of Clí.

InChI:InChI=1/C12H3Cl5O2/c13-4-1-7-8(2-5(4)14)19-12-9(18-7)3-6(15)10(16)11(12)17/h1-3H

Upstream product

• 262-12-4 dioxin 
• 39227-28-6 1,2,3,4,7,8-hexachlorodibenzodioxin 
• 58-89-9 LINDANE 
• 120-36-5 2-(2,4-dichlorophenoxy)propionic acid 
• 95-95-4 2,4,5-trichlorophenol 

Relevant articles and documents

Formation and emission status of PCDDS/PCDFS in municipal solid waste incinerators in korea

This study was carried out to examine the formation and the emission status of polychlorinated dibenzo-p-dioxins/ polychlorinated dibenzofurans (PCDDs/PCDFs) in the flue gases of commercial-scale municipal solid waste (MSW) incinerators, and thus to provi

PCDD/DF formations by the heterogeneous thermal reactions of phenols and their TiO2 photocatalytic degradation by batch-recycle system

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/DFs) formation by the thermal reactions of phenols with CuCl2 under oxygen flux were carried out in relation to their formation mechanisms: To evaluate the effect of photocatalytic degra

Study of evolution of PCDD/F in sewage sludge-amended soils for land restoration purposes

The evolution of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) in sewage sludge-amended soils used in the restoration of degraded lands, like quarries, has been studied. Two experiments were performed: one in the lab, under controlled conditions, and another in a quarry. Two different doses of sewage sludge were applied in both experiments (with two types of application in the quarry experiment) and the evolution of the amended soils were compared with that of the respective control soils (without addition of sewage sludge). The samples were analyzed with a previously validated method by HRGC-HRMS after the extraction and the necessary clean-up steps. The results reveal that polluted sewage sludge increases PCDD/F concentration in soils and that these compounds are persistent in the matrix after long periods of time. (C) 2000 Elsevier Science Ltd. The evolution of polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF) in sewage sludge-amended soils used in the restoration of degraded lands, like quarries, has been studied. Two experiments were performed: one in the lab, under controlled conditions, and another in a quarry. Two different doses of sewage sludge were applied in both experiments (with two types of application in the quarry experiment) and the evolution of the amended soils were compared with that of the respective control soils (without addition of sewage sludge). The samples were analyzed with a previously validated method by HRGC-HRMS after the extraction and the necessary clean-up steps. The results reveal that polluted sewage sludge increases PCDD/F concentration in soils and that these compounds are persistent in the matrix after long periods of time. Laboratory and field experiments were conducted in Spain to examine the evolution of PCDDs and PCDFs in sewage-sludge-amended soils. The PCDD/F concentrations were measured in the original sewage sludge and in soil samples over time. Results from the laboratory showed that the PCDD/F concentration in amended soils was related directly to the sewage-sludge dose applied. After 1 yr, however, no evolution of PCDD/Fs was observed in any sample. In the field, high dispersion was observed, which did not allow establishment of a concentration trend over time. (from Eighteenth Symp on Halogenated Environ Organic Pollutants-Dioxin '98, Stockholm, Sweden (Aug 17-21, 98)).