33857-28-2

Basic information

• Product Name: 2,3,7-TRICHLORODIBENZO-P-DIOXIN
• Synonyms: 2,3,7-trichlorodibenzodioxin;2,3,7-trichloro-dibenzo-p-dioxi;Dibenzo-p-dioxin, 2,3,7-trichloro-;2,3,7-TRICHLORODIBENZO-PARA-DIOXIN;2,3,7-TRICHLORODIBENZO-P-DIOXIN (50 UG/ML IN ISOOCTANE);2,3,7-TCDD;2,3,7-TriCDD;2,3,7-Trichlorodibenzo[1,4]dioxin
• CAS NO: 33857-28-2
• Molecular Formula: C₁₂H₅Cl₃O₂
• Molecular Weight: 287.5259
• Mol File: 33857-28-2.mol
• Article Data: 3

Chemical Properties

• Melting Point: 162.5°C
• Boiling Point: 369.88°C (rough estimate)
• Flash Point: 152.8°C
• Appearance: /
• Density: 1.5630 (estimate)
• Vapor Pressure: 8.84E-06mmHg at 25°C
• Refractive Index: 1.6500 (estimate)
• CAS DataBase Reference: 2,3,7-TRICHLORODIBENZO-P-DIOXIN(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3,7-TRICHLORODIBENZO-P-DIOXIN(33857-28-2)
• EPA Substance Registry System: 2,3,7-TRICHLORODIBENZO-P-DIOXIN(33857-28-2)

Safety Data

• Hazardous Substances Data: 33857-28-2(Hazardous Substances Data)

Usage

Uses

2,3,7-Trichlorodibenzo-p-dioxin is a standard used in environmental testing and research and has been linked to disruption of homeostasis of peripheral B cell compartments and impairment within human B lymphopoiesis.

Safety Profile

A poison by ingestion.Questionable carcinogen. When heated to decompositionit emits toxic vapors of Clí.

InChI:InChI=1/C12H5Cl3O2/c13-6-1-2-9-10(3-6)17-12-5-8(15)7(14)4-11(12)16-9/h1-5H

Upstream product

• 262-12-4 dioxin 
• 1746-01-6 2,3,7,8-Tetrachloro-dibenzo[1,4]dioxine 

Downstream Products

• 71721-80-7 2-amino-3,7,8-trichlorodibenzo-p-dioxin 
• 82019-04-3 2-hydroxy-3,7,8-trichlorodibenzo-4-dioxin 

Relevant articles and documents

Identification of surrogate compounds for the emission of PCDD/F (I-TEQ value) and evaluation of their on-line realtime detectability in flue gases of waste incineration plants by REMPI-TOFMS mass spectrometry

Correlations between products of incomplete combustion (PIC), e.g., chloroaromatic compounds, can be used to characterise the emissions from combustion processes, like municipal or hazardous waste incineration. A possible application of such relationships may be the on-line real-time monitoring of a characteristic surrogate, e.g., with Resonance-Enhanced Multiphoton Ionization-Time-of-Flight Mass Spectrometry (REMPI-TOFMS). In this paper, we report the relationships of homologues and individual congeners of chlorinated benzenes (PCBz), dibenzo-p-dioxins (PCDD), dibenzofurans (PCDF) and phenols (PCPh) to the International Toxicity Equivalent (I-TEQ) of the PCDD/F (I-TEQ value) in the flue gas and stack gas of a 22 MW hazardous waste incinerator (HWI). As the REMPI detection sensitivity is decreasing with the increase of the degree of chlorination, this study focuses on the lower chlorinated species of the compounds mentioned above. Lower chlorinated species, e.g., chlorobenzene (MCBz), 1,4-dichlorobenzene, 2,4,6-trichlorodibenzofuran or 2,4-dichlorophenol, were identified as I-TEQ surrogates in the flue gas. In contrast to the higher chlorinated phenols, the lower chlorinated phenols (degree of chlorination 4) were not reliable as surrogates in the stack gas. The identified surrogates are evaluated in terms of their detectability by REMPI-TOFMS laser mass spectrometry. The outcome is that MCBz is the best suited surrogate for (indirect) on-line measuring of the I-TEQ value in the flue gas by REMPI-TOFMS. The correlation coefficient r of the MCBz concentration to the I-TEQ in the flue gas was 0.85.

EFFECT OF THE CROWN ETHER 18-CROWN-6-ON CHLORINATION OF DIBENZO-p-DIOXIN AND ITS DERIVATIVES

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