446255-54-5

Basic information

• Product Name: 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER
• Synonyms: 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER;(Pentabromophenyl)(2,4,6-tribromophenyl) ether;2,4,6-Tribromophenyl(pentabromophenyl) ether;BDE-204;Pentabromophenyl(2,4,6-tribromophenyl) ether;1,2,3,4,5-Pentabromo-6-(2,4,6-tribromophenoxy)benzene;PBDE 204
• CAS NO: 446255-54-5
• Molecular Formula: C12H2Br8O
• Molecular Weight: 801.37568
• Mol File: 446255-54-5.mol

Chemical Properties

• Melting Point: 197.5-198.5 °C
• Boiling Point: 506.7±50.0 °C(Predicted)
• Appearance: /
• Density: 2.768±0.06 g/cm3(Predicted)
• CAS DataBase Reference: 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER(446255-54-5)
• EPA Substance Registry System: 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER(446255-54-5)

Safety Data

• Hazardous Substances Data: 446255-54-5(Hazardous Substances Data)

Usage

Uses

Used in Electronics Industry:
2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER is used as an additive flame retardant for enhancing the fire safety of electronic devices and components. Its high bromine content helps to slow down the spread of fire and reduce the heat release rate, thereby protecting electronic equipment from potential damage caused by fires.
Used in Textile Industry:
In the textile industry, 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER is used as a flame retardant for fabrics and materials used in upholstery, curtains, and other home furnishings. 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER helps to reduce the risk of fire by making the materials more resistant to ignition and slowing down the spread of flames.
Used in Construction Industry:
2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER is also utilized in the construction industry as a flame retardant for various building materials, such as insulation, wall coverings, and flooring. 2,2',3,4,4',5,6,6'-OCTABROMODIPHENYL ETHER's fire-resistant properties help to improve the overall safety of buildings and reduce the risk of fire-related accidents.
However, it is important to note that PBDE 204, like other polybrominated diphenyl ethers, has raised environmental concerns due to its persistence in the environment and potential toxic effects on human health and wildlife. As a result, there has been a growing trend towards finding safer alternatives to these compounds for use as flame retardants.

Upstream product

• 1163-19-5 2,2',3,3',4,4',5,5',6,6'-Decabromodiphenyl ether 

Relevant articles and documents

Rapid, photocatalytic, and deep debromination of polybrominated diphenyl ethers on Pd-TiO2: Intermediates and pathways

Titanium dioxide with surface-loaded palladium (Pd-TiO2) was able to easily remove all ten bromine atoms from decabromodiphenyl ether (BDE209) within 1 h under the irradiation of sunlight or an artificial light source. By contrast, fewer than three bromine atoms were eliminated on the pristine TiO2 even with prolonged irradiation (5 h). During the photocatalytic debromination, moreover, the formed BDE intermediates exhibited a significant difference between the Pd-TiO2 and pristine TiO 2 systems, and much less position selectivity for the debromination on Pd-TiO2 was observed than that on the pristine TiO2 surface. For another polybrominated diphenyl ether (BDE15), pristine TiO 2 was incapable of its photocatalytic reduction, whereas the loading of Pd enabled its debromination to diphenyl ether within 20 min. In addition, an evident induction period appeared in the photocatalytic debromination of BDE15 on Pd-TiO2. The experiments imply that the Pd-cocatalyzed effect changes significantly the photocatalytic reductive debromination pathways.

Synthesis of octabrominated diphenyl ethers from aminodiphenyl ethers

Polybrominated diphenyl ethers (PBDEs) are additive brominated flame retardants (BFRs), which have become widespread pollutants in abiotic and biotic environments including man. Tetra- to hexaBDEs and decaBDE are the most common environmental PBDE contaminants. Congeners of octabromodiphenyl ethers (octaBDEs) originate from used industrial OctaBDE mixtures and from transformation products of the high-volume industrial BFR mixture "DecaBDE", which most exclusively consists of perbrominated diphenyl ether (BDE-209). The objective of the present work was to develop methods for the synthesis of authentic octaBDE congeners in order to make them available as standards for analytical, toxicological, and stability studies, as well as studies concerning physical-chemical properties. The syntheses of six octaBDEs, 2,2′,3,3′,4,4′,5,5′-octabromodiphenyl ether (BDE-194), 2,2′,3,3′,4,4′,5,6′-octabromodiphenyl ether (BDE-196), 2,2′,3,3′,4,5,5′,6-octabromodiphenyl ether (BDE-198), 2,2′,3,3′,4,5′,6,6′-octabromodiphenyl ether (BDE-201), 2,2′,3,3′,5,5′,6,6′-octabromodiphenyl ether (BDE-202), and 2,2′,3,4,4′,5,6,6′-octabromdipheny ether (BDE-204), are described, of which BDE-204 was prepared via two different pathways. Syntheses of BDE-198, BDE-201, BDE-202, and BDE-204 are based on octabromination of mono- or diaminodiphenyl ethers followed by diazotization and reduction of the amino group(s). BDE-194 and BDE-196 were prepared by bromination of 3,3′,4,4′,5,5′-hexabromodiphenyl ether (BDE-169) and 2,3,3′,4,4′,5′,6-heptabromodiphenyl ether (BDE-191), respectively, and BDE-169 and BDE-191 were prepared from 4,4′- diaminodiphenyl ether and 3,4′-diamiodiphenyl ether, respectively. The synthesized PBDE congeners are described by 1H NMR, 13C NMR, electron ionization mass spectra, and their melting points.