1,2,3,6,7,8-HEXACHLORODIBENZO-P-DIOXIN

Chemistry informtion about 1,2,3,4,7,8-Hexachlorodibenzo-P-Dioxin(57653-85-7)  is:
IUPAC Name: 1,2,3,6,7,8-hexachlorooxanthrene
Synonyms: 1,2,3,6,7,8-hexachlorodibenzodioxin;1,2,3,6,7,8-hexachlorodibenzo-para-dioxin;1,2,3,6,7,8-hexachloro-dibenzo-p-dioxi;1,2,3,6,7,8-Hexachloro-p-dioxin;1,2,3,6,7,8-hxcdd;1,2,3,7,8,9-Hexachlorooxanthrene;Dibenzo(b,e)(1,4)dioxin, 1,2,3,6,7,8-hexachloro-;dibenzo(b,e)(1,4)dioxin,1,2,3,6,7,8-hexachloro-[qr]
Molecular Weight: 390.86108 [g/mol]
Molecular Formula: C₁₂H₂Cl₆O₂
XLogP3: 7.4
H-Bond Donor: 0
H-Bond Acceptor: 2 
Density: 1.777 g/cm³
Flash Point: 182.9 °C
Enthalpy of Vaporization: 71.37 kJ/mol
Boiling Point: 478 °C at 760 mmHg
Vapour Pressure: 7.72E-09 mmHg at 25°C
Following is the molecular structure of  1,2,3,4,7,8-Hexachlorodibenzo-P-Dioxin(57653-85-7) is:

IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 , 1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 15 , 1977,p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human No Adequate Data IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 15 , 1977,p. 41.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

A deadly poison by ingestion. Questionable carcinogen. When heated to decomposition it emits toxic fumes of Cl⁻. 
RIDADR: 2811
HazardClass: 6.1(a)
PackingGroup: I

1,2,3,4,7,8-Hexachlorodibenzo-P-Dioxin(57653-85-7) is a fluffy white solid. It insoluble in water. It is the type of compound that is extremely stable, even on heating to 1292° F. Solutions of 1,2,3,4,7,8-Hexachlorodibenzo-P-Dioxin may be sensitive to light. Solutions of this type of compound in methanol are degraded by exposure to summer sunlight or irradiation with an ultraviolet lamp (300 nm). 1,2,3,4,7,8-Hexachlorodibenzo-P-Dioxinis probably combustible.