2,3',4,4',6-Pentabromodiphenyl Ether: Properties & Research Use
2,3',4,4',6-Pentabromodiphenyl Ether: Properties & Research Use
2,3',4,4',6-Pentabromodiphenyl ether is a polybrominated diphenyl ether (PBDE) congener, designated BDE-116, that serves as an important analytical reference standard for environmental monitoring, toxicological research, and regulatory compliance studies.
- IUPAC Name
- 2,3',4,4',6-Pentabromodiphenyl ether
- PBDE Congener Number
- BDE-116
- Number of Bromine Substituents
- 5
- Chemical Class
- Polybrominated diphenyl ether (PBDE)
- Primary Research Use
- Analytical reference standard for environmental and toxicological studies
- Aladdin SKU
- P1539545
Chemical Identity and Structure
2,3',4,4',6-Pentabromodiphenyl ether (BDE-116) belongs to the family of polybrominated diphenyl ethers (PBDEs), a group of organobromine compounds characterized by two phenyl rings connected through an oxygen bridge, with bromine atoms substituted at defined positions. In BDE-116, five bromine atoms occupy the 2, 3', 4, 4', and 6 positions of the biphenyl ether scaffold, conferring a distinct substitution pattern compared to other pentabrominated congeners such as BDE-99 or BDE-100.
The molecular formula of pentabromodiphenyl ethers is C12H5Br5O, with a molecular weight of approximately 564.7 g/mol. The high degree of bromination imparts significant lipophilicity and persistence, properties shared across the PBDE class. Congener-specific identification and quantification rely on the precise bromine substitution pattern, making high-purity reference standards essential for accurate analytical work.
Environmental Significance and Regulatory Context
PBDEs, including pentabrominated congeners, were widely used as additive flame retardants in polymers, textiles, electronic equipment, and foam-based materials throughout the latter decades of the twentieth century. Their chemical stability, which made them effective flame retardants, also rendered them resistant to environmental degradation, leading to their classification as persistent organic pollutants (POPs).
BDE-116 and related pentabrominated congeners have been detected in environmental matrices including sediments, wildlife tissue, and human serum, reflecting bioaccumulation through food chains. International regulatory frameworks, including the Stockholm Convention, have restricted or eliminated the production and use of PentaBDE commercial mixtures. Consequently, reference standards such as BDE-116 are indispensable for environmental monitoring programs, exposure assessment studies, and method validation in compliance laboratories.
Analytical Applications and Laboratory Use
High-purity 2,3',4,4',6-Pentabromodiphenyl ether is employed as a certified or neat reference standard in a range of analytical workflows. Gas chromatography coupled with electron-capture detection (GC-ECD) or mass spectrometry (GC-MS and GC-MS/MS) represents the primary analytical platform for PBDE congener separation and quantification in complex environmental and biological matrices.
BDE-116 may serve as an internal standard, surrogate standard, or calibration standard depending on the analytical method employed. Method development and validation for regulatory submissions—such as those following US EPA methods or ISO standard procedures—require well-characterized, traceable reference materials. Researchers in toxicokinetics, biomonitoring, and ecological risk assessment routinely use congener-specific standards to assess PBDE distribution and metabolism in biological systems.
Safe Handling and Storage Recommendations
As with all PBDE reference standards, 2,3',4,4',6-Pentabromodiphenyl ether should be handled with appropriate precautions. Laboratory personnel should consult the Safety Data Sheet (SDS) supplied by Aladdin Scientific before use. General good laboratory practice dictates the use of chemical-resistant gloves, safety eyewear, and operation within a fume hood or well-ventilated area when handling halogenated organic standards.
Reference standard solutions are typically supplied in organic solvents such as isooctane, hexane, or toluene. Containers should be kept tightly sealed and stored away from heat sources, open flames, and incompatible materials. Long-term storage at low temperature (e.g., –20 °C or as specified on the product label) helps maintain compound integrity and analytical accuracy. Disposal must comply with applicable local, national, and institutional regulations governing halogenated organic waste.
Frequently asked questions
What is the PBDE congener number for 2,3',4,4',6-Pentabromodiphenyl ether?
2,3',4,4',6-Pentabromodiphenyl ether is designated BDE-116 in the standard PBDE congener numbering system. This number reflects its specific bromine substitution pattern on the diphenyl ether backbone.
How is BDE-116 typically used in analytical chemistry workflows?
BDE-116 is used as a calibration standard, surrogate standard, or internal standard in GC-ECD and GC-MS methods for the detection and quantification of PBDE congeners in environmental and biological samples. Its high purity and defined structure make it suitable for method development and validation in regulatory and research laboratories.
Why is BDE-116 environmentally significant?
BDE-116 belongs to the PentaBDE mixture class, which has been detected as a persistent organic pollutant in sediments, wildlife, and human tissues globally. Its resistance to environmental degradation and capacity for bioaccumulation make it a key analyte in environmental monitoring and exposure assessment programs.
What storage conditions are recommended for BDE-116 reference standards?
BDE-116 reference standards should be stored at low temperature, typically –20 °C or as specified on the product label, in tightly sealed containers away from heat, light, and incompatible materials. Always consult the product SDS for specific storage and handling guidance.
References
- Stockholm Convention on Persistent Organic Pollutants. United Nations Environment Programme. Listing of PentaBDE.
- de Wit CA. An overview of brominated flame retardants in the environment. Chemosphere. 2002.
- US EPA Method 1614: Brominated Diphenyl Ethers in Water, Soil, Sediment, and Tissue by HRGC/HRMS.
Products are supplied for research and development use only. Not for use in humans, animals, diagnosis, or therapy.
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