1,2,3,7,8,9-Hexachlorodibenzo-P-Dioxin

Chemistry informtion about 1,2,3,7,8,9-Hexachlorodibenzo-P-Dioxin(19408-74-3) is:
IUPAC Name: 1,2,3,7,8,9-hexachlorooxanthrene
Synonyms: 1,2,3,7,8,9-Hexachlorodibenzo(B,E)(1,4)Dioxin ; 1,2,3,7,8,9-Hexachloro-Dibenzo-P-Dioxi ; D70 ; Dibenzo-P-Dioxin,1,2,3,7,8,9-Hexachloro- ; Dibenzo-Para-Dioxin,Hexachloro- ; 1,2,3,7,8,9-Hcdd ; 1,2,3,7,8,9-Hxcdd ; 2,3,4,6,7,8-Hcdd
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 1,2,3,7,8,9-Hexachlorodibenzo-P-Dioxin(19408-74-3) 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 poison by ingestion. Questionable carcinogen. Mutation data reported. When heated to decomposition it emits toxic vapors of Cl⁻. 
RIDADR: 2811
HazardClass: 6.1(a)
PackingGroup: I

1,2,3,7,8,9-Hexachlorodibenzo-P-Dioxin(19408-74-3) is a light pink crystalline solid. It insoluble in water. It is stable under normal laboratory conditions. Solutions may be sensitive to light. Methanol solutions are degraded on exposure to sunlight or ultraviolet irradiation. 1,2,3,7,8,9-Hexachlorodibenzo-P-Dioxin is probably combustible.