39227-28-6

Basic information

• Product Name: 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN
• Synonyms: 1,2,3,4,7,8-hexachlorodibenzo(b,e)(1,4)dioxin;1,2,3,4,7,8-hexachlorodibenzodioxin;1,2,3,4,7,8-hexachloro-dibenzo-p-dioxi;1,2,3,4,7,8-Hexachlorooxanthrene;d66;Dibenzo-p-dioxin, hexachloro-;Hcdd;Hexachlorodibenzo-p-dioxin
• CAS NO: 39227-28-6
• Molecular Formula: C₁₂H₂Cl₆O₂
• Molecular Weight: 390.86108
• Product Categories: Aromatics;Heterocycles;Aromatics, Heterocycles
• Mol File: 39227-28-6.mol
• Article Data: 10

Chemical Properties

• Melting Point: 273°C
• Boiling Point: 475.35°C (rough estimate)
• Flash Point: 181.4°C
• Appearance: /
• Density: 1.8350 (estimate)
• Vapor Pressure: 1E-08mmHg at 25°C
• Refractive Index: 1.6710 (estimate)
• Water Solubility: 0.007896ug/L(26 oC)
• CAS DataBase Reference: 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN(39227-28-6)
• EPA Substance Registry System: 1,2,3,4,7,8-HEXACHLORODIBENZO-P-DIOXIN(39227-28-6)

Safety Data

• RIDADR: 2811
• HazardClass: 6.1(a)
• PackingGroup: II
• Hazardous Substances Data: 39227-28-6(Hazardous Substances Data)

Usage

Uses

A toxic polychlorinated dibenzo-p-dioxin detected in domestic meat and poultry.

InChI:InChI=1/C12H2Cl6O2/c13-3-1-5-6(2-4(3)14)20-12-10(18)8(16)7(15)9(17)11(12)19-5/h1-2H

Upstream product

• 95-95-4 2,4,5-trichlorophenol 

Downstream Products

• 34816-53-0 1,2,7,8-tetrachlorodioxine 
• 40321-76-4 1,2,3,7,8-pentachlorodibenzodioxin 
• 58802-08-7 1,2,4,7,8-pentachlorodibenzo-p-dioxin 
• 1746-01-6 2,3,7,8-Tetrachloro-dibenzo[1,4]dioxine 
• 50585-46-1 1,3,7,8-tetrachloro-dibenzo[1,4]dioxine 
• 58200-70-7 1,2,3,4,6,7,9-heptachlorodibenzo-p-dioxin 
• 35822-46-9 HpCDD 1234678 
• 3268-87-9 1,2,3,4,6,7,8,9-octachlorodibenzodioxin 

Relevant articles and documents

PCDD/DF formations by the heterogeneous thermal reactions of phenols and their TiO2 photocatalytic degradation by batch-recycle system

Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/DFs) formation by the thermal reactions of phenols with CuCl2 under oxygen flux were carried out in relation to their formation mechanisms: To evaluate the effect of photocatalytic degra

Dioxins from thermal and metallurgical processes: Recent studies for the iron and steel industry

In thermal metallurgical processes such as iron ore sintering and metal smelting operations, large flows of off-gases are generated. Mainly due to residue recycling in such processes, chlorine and volatile organics are always present in the feed. As a consequence of de novo formation, the off-gases from such processes typically contain dioxins in the range 0.3-30 ng I-TEQ/Nm3. So far there are only very few studies about the mechanisms of dioxin formation and destruction in these metallurgical processes. In an European Union (EU) research project Minimization of dioxins in thermal industrial processes: mechanisms, monitoring and abatement (MINIDIP) , integrated iron and steel plant has been selected as one of the industrial sectors for further investigation. A large number of particulate samples (feed, belt siftings, electrofilter) were collected from the iron ore sintering installations from various steel plants and analyzed for their organochlorocompound contents. Measurable amounts of PCDD/F, PCBz, PCB were found for all samples. The various parameters influencing their de novo synthesis activity were also evaluated in laboratory experiments, and such activity was found to be moderate for samples from the ore sinter belt, but extremely high for some ESP dusts. Fine dust is active in a wide range of temperatures starting at 200°C and declining above 450°C; the optimal temperature for de novo synthesis was found to be around 350°C; some inhibitors, such as triethanolamine, may reduce de novo activity by 50%, and lowering the O2 concentration in the gas stream leads to a much lower amount of PCDD/F formation. On the basis of their relative mass, typical operating conditions and specific activity of the different samples, the regions in the sintering plant where de novo synthesis may take place were tentatively established.

The effect of oils on PAH, PCDD, PCDF, and PCB emissions from a spark engine fueled with leaded gasoline

The effect of synthetic and mineral oils on the formation of polyaromatic hydrocarbons (PAHs), polychlorinated dibenzo-p-dioxins (PCDDs), dibenzofurans (PCDFs), and biphenyls (PCBs) in emissions from a spark ignition engine was studied on a Skoda Favorit engine fueled with leaded gasoline. The test cycle simulated urban traffic conditions on a chassis dynamometer, in accordance with the ECC 83.00 test. The data for selected PAHs as well as PCDDs, PCDFs, and PCBs congener profiles are presented. PCDD/Fs emissions for an unused oil and the oil after 10 000-km operation varied from 300 to 2000 fmol/m3, PCBs emissions from 75 to 178 pmol/m3, and PAHs emissions from 150 to 420 μg/m3. The content of PCBs in oils varied from 2 to 920 mg/kg.