39227-61-7

Basic information

• Product Name: 1,2,3,4,7-PENTACHLORODIBENZO-P-DIOXIN
• Synonyms: 1,2,3,4,7-pentachlorodibenzodioxin;1,2,3,4,7-pentachlorodibenzo-para-dioxin;1,2,3,4,7-pentachloro-dibenzo-p-dioxi;Dibenzo-p-dioxin, 1,2,3,4,7-pentachloro-;1,2,3,4,7-PNCDD
• CAS NO: 39227-61-7
• Molecular Formula: C12H3Cl5O2
• Molecular Weight: 356.41602
• Mol File: 39227-61-7.mol
• Article Data: 3

Chemical Properties

• Melting Point: 206°C (estimate)
• Boiling Point: 442.63°C (rough estimate)
• Flash Point: 171.8°C
• Appearance: /
• Density: 1.7800 (estimate)
• Vapor Pressure: 1.15E-07mmHg at 25°C
• Refractive Index: 1.6610 (estimate)
• Water Solubility: 0.165ug/L(26.0 oC)
• CAS DataBase Reference: 1,2,3,4,7-PENTACHLORODIBENZO-P-DIOXIN(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,3,4,7-PENTACHLORODIBENZO-P-DIOXIN(39227-61-7)
• EPA Substance Registry System: 1,2,3,4,7-PENTACHLORODIBENZO-P-DIOXIN(39227-61-7)

Safety Data

• RIDADR: 2811
• HazardClass: 6.1(a)
• PackingGroup: I
• Hazardous Substances Data: 39227-61-7(Hazardous Substances Data)

Usage

Safety Profile

Questionable carcinogen. When heated to decomposition it emits toxic vapors of Clí

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

Upstream product

• 7778-73-6 pentachloro-phenol; potassium-compound 
• 50884-30-5 potassium salt of 2,4-dichlorophenol 

Relevant articles and documents

Role of copper chloride in the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans during incineration

Combustion experiments in a laboratory-scale fluidized-bed reactor were performed to elucidate the role of copper chloride in formation of polychlorinated dibenzo-p-dioxins (PCDDs) and dibenzofurans (PCDFs) during model waste incineration. The amounts of PCDDs and PCDFs formed, the homologue profiles, and the isomer distributions were measured in the flue gas from incineration of model wastes containing various levels of copper. A correlation was found between the Cu content of the waste and the proportion of each congener. An increase in copper enhanced the formation of certain congeners, showing that copper acts as a catalyst for formation of PCDDs and PCDFs. An increase in the copper content of the waste decreased the CO concentration in the flue gas and reduced the formation of PCDDs and PCDFs during incineration. This indicates that copper also works as an oxidation catalyst to promote combustion, leading to lower concentrations of products of incomplete combustion. It is indispensable to consider both roles of the catalyst, i.e., enhancement and suppression, in the formation of PCDDs and PCDFs during waste incineration, which are estimated separately from the isomer distributions and the amounts of PCDDs and PCDFs formed.

Isomer-Specific Separation of 2378-Substituted Polychlorinated Dibenzo-p-dioxins by High-Resolution Gas Chromatography/Mass Spectrometry

All polychlorinated dibenzo-p-dioxin (PCDD) isomers containing four and more chlorine substituents were prepared by micropyrolysis of chlorophenolates.The synthesis included the preparation of all 22 tetra-, 14 penta-, 10 hexa-, 2 hepta-, and octachlorinated species (tetra- to octa-CDD).The gas chromatographic and mass spectrometric properties of these isomers were studied.High resolution gas chromatography (HRGC) on a 55-m Silar 10c glass capillary column allowed the separation of many of these isomers and allowed the unambiguous assignment of the toxic and environmentally hazardous 2378-substituted isomers (2378-tetra-, 12378-penta-, 123478-, 123678-, and 123789-hexa-CDD).Analyses were carried out to determine the occurence of these isomers in environmental samples and in fly ash from municipal incinerators.