133513-17-4

Basic information

• Product Name: 2,3,7,8-tetrachlorodibenzo[b,d]thiophene
• CAS NO: 133513-17-4
• Molecular Formula: C₁₂H₄Cl₄S
• Molecular Weight: 322.0372
• Mol File: 133513-17-4.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 460.1°C at 760 mmHg
• Flash Point: 298.9°C
• Density: 1.651g/cm³
• Vapor Pressure: 3.29E-08mmHg at 25°C
• Refractive Index: 1.756
• CAS DataBase Reference: 2,3,7,8-tetrachlorodibenzo[b,d]thiophene(CAS DataBase Reference)
• NIST Chemistry Reference: 2,3,7,8-tetrachlorodibenzo[b,d]thiophene(133513-17-4)
• EPA Substance Registry System: 2,3,7,8-tetrachlorodibenzo[b,d]thiophene(133513-17-4)

Safety Data

• Hazardous Substances Data: 133513-17-4(Hazardous Substances Data)

Usage

General Description

2,3,7,8-tetrachlorodibenzo[b,d]thiophene is a chemical compound that belongs to the class of organic compounds known as polychlorinated dibenzothiophenes. Its systematic name is 2,3,7,8-tetrachlorodibenzo[b,d]thiophene. This chemical is notable for its complex structure defined by a pair of benzene rings fused to a thiophene ring, with chlorine atoms attached at the 2,3,7 and 8 positions on the two benzene rings. It has been used in scientific research, often as a precursor or component in the synthesis of other chemical compounds, and it is known to contribute towards environmental pollution due to its persistence and potentially harmful effects. However, it is not known to have any major commercial or industrial uses.

Upstream product

• 32598-13-3 33'44'-tetrachlorinated biphenyl 

Relevant articles and documents

Sulfur analogues of polychlorinated dibenzo-p-dioxins, dibenzofurans and diphenyl ethers as inducers of CYP1A1 in mouse hepatoma cell culture and structure-activity relationships

Three sulfur-containing compounds, 2,3,7,8-tetrachlorothianthrene (TCTA), 2,3,7,8-tetrachlorodibenzothiophene (TCDT), and 3,3',4,4'- tetrachlorodiphenyl sulfide (TCDPS), were analyzed for their CYP1A1-inducing potencies - measured as aryl hydrocarbon hydroxylase (AHH) and 7- ethoxyresorufin O-deethylase (EROD) activities - in mouse hepatoma cell culture Hepa-1. Marked differences in the induction potencies were observed among the three compounds studied and between 2,3,7,8-tetrachlorodibenzo-p- dioxin (TCDD) and its sulfur analogue. The estimated EC50 values for TCDD, TCTA, and TCDT were about 8 pM, 700 pM, and 7.5 nM, respectively. TCDPS did not elicit any AHH/EROD induction. Comparative molecular field analysis (CoMFA) was not able to predict correctly the biological potency of TCTA and TCDT. The most important reason for the poor performance of the model may be the positive point charge of sulfur in TCTA and TCDT.