Chemical Identity and Physical Properties

2,2',3,3',4,4',5,5'-Octabromobiphenyl (OBB) belongs to the polybrominated biphenyl (PBB) family, a group of synthetic organobromine compounds historically used as flame retardants. With eight bromine atoms substituted at the 2, 2', 3, 3', 4, 4', 5, and 5' positions of the biphenyl scaffold, this congener represents one of the most heavily halogenated members of the PBB series.

The high degree of bromination confers exceptional thermal stability and chemical inertness to the molecule. The molecular formula is C₁₂H₂Br₈, and the estimated molecular weight is approximately 943.6 g/mol, though researchers should verify the precise value against the current product specification sheet (review flag applies). The compound is expected to exhibit very low water solubility and high lipophilicity, properties consistent with its classification as a persistent, bioaccumulative substance.

The rigid, planar biphenyl core combined with bulky bromine substituents restricts free rotation around the inter-ring bond, influencing both its crystalline packing and its environmental behaviour. These physicochemical characteristics are central to its behaviour in biological matrices and environmental compartments.

Safe Handling, Storage, and Waste Disposal

Personal Protective Equipment (PPE): When handling 2,2',3,3',4,4',5,5'-Octabromobiphenyl, researchers must wear appropriate PPE including nitrile gloves, a laboratory coat, and safety glasses or goggles. If there is any risk of dust generation, a NIOSH-approved particulate respirator should be used. All handling should be performed in a well-ventilated laboratory or within a chemical fume hood.

Storage: Store the compound in a tightly sealed container in a cool, dry, and well-ventilated location, away from direct sunlight, heat sources, and incompatible materials such as strong oxidising agents. Recommended storage temperature should be confirmed against the product specification sheet provided by Aladdin Scientific, as conditions may vary by lot (review flag applies).

Spill Management: In the event of a spill, avoid generating dust. Collect the material using inert, non-combustible absorbent material and transfer to a labelled, sealed waste container. Decontaminate affected surfaces with appropriate solvent.

Waste Disposal: Disposal must comply with all applicable local, national, and international regulations governing halogenated organic wastes. Do not dispose of via drain or general waste streams. Consult your institutional environmental health and safety (EHS) office for approved disposal pathways. Incineration at a licensed facility is typically required for PBB-containing wastes (review flag applies).

Research Applications and Analytical Use

2,2',3,3',4,4',5,5'-Octabromobiphenyl is primarily employed as an analytical reference standard in environmental chemistry, toxicology, and food safety research. Its primary utility lies in the calibration and validation of analytical methods designed to detect and quantify PBB congeners in complex matrices such as biological tissues, sediments, food products, and consumer goods.

Environmental Monitoring: OBB serves as a certified or working reference material in gas chromatography–mass spectrometry (GC-MS) and high-resolution mass spectrometry (HRMS) methods used to monitor PBB contamination in environmental samples. Given that PBBs are listed among regulated persistent organic pollutants (POPs), the availability of well-characterised reference standards is essential for regulatory compliance testing.

Toxicological and Mechanistic Studies: Researchers use OBB to investigate the molecular mechanisms by which highly brominated PBBs interact with biological systems, including potential endocrine-disrupting effects, hepatotoxicity, and interactions with aryl hydrocarbon receptor (AhR) signalling pathways (review flag: specific mechanistic claims require peer-reviewed citations).

Method Development: Laboratories developing or validating multi-residue screening methods for halogenated contaminants routinely include OBB as part of their reference standard mixtures to ensure method coverage across the full bromination spectrum of the PBB series.

Regulatory and Environmental Context

Polybrominated biphenyls as a class have been subject to increasing regulatory scrutiny worldwide due to their persistence, bioaccumulation potential, and toxicity. Researchers working with OBB and related PBB congeners should be aware of the following regulatory frameworks, though confirmation of the current status applicable to their jurisdiction is strongly advised:

• Stockholm Convention: PBBs have been considered within the scope of discussions on persistent organic pollutants under the Stockholm Convention. Researchers should verify current Annex listings (review flag).
• EU RoHS Directive: The EU Restriction of Hazardous Substances (RoHS) Directive restricts the use of PBBs in electrical and electronic equipment. This is relevant context for laboratories conducting compliance testing.
• EU REACH Regulation: OBB may be subject to REACH substance restrictions or authorisation requirements. Verification against the current REACH candidate list and restriction annexes is recommended (review flag).
• Import and Export Controls: Due to its classification as a regulated organohalogen, import and export of OBB may be subject to licensing or notification requirements in certain jurisdictions (review flag).

Procurement teams should ensure that appropriate documentation, including Safety Data Sheets (SDS), is obtained from Aladdin Scientific prior to ordering and that all institutional approval processes are completed before the compound is used in research.

Ordering, Specifications, and Quality Assurance

2,2',3,3',4,4',5,5'-Octabromobiphenyl is available from Aladdin Scientific under SKU O1539409. Researchers and procurement officers are advised to request the current product specification sheet and Certificate of Analysis (CoA) prior to or at the time of ordering to confirm:

• Purity grade and analytical method used for purity determination (e.g., GC, HPLC, or NMR)
• Exact molecular weight and CAS number as confirmed for the specific lot
• Recommended storage conditions and shelf life
• Solvent recommendations for stock solution preparation

For sensitive analytical applications such as environmental reference standards or regulatory compliance testing, researchers should enquire about the availability of lot-specific calibration data or certified reference material (CRM) status. Aladdin Scientific's technical support team can be contacted for application-specific guidance and custom quantity requirements.

When preparing stock solutions, common organic solvents such as dimethyl sulfoxide (DMSO), acetonitrile, or tetrahydrofuran (THF) may be considered based on the application; however, solubility data should be confirmed against the product documentation prior to use (review flag: solubility data not confirmed in source material).