Description

2,2',4,4',6,6'-Hexachlorobiphenyl is a specific, fully chlorinated congener of the polychlorinated biphenyl (PCB) family, identified by CAS NO 33979-03-2. This compound is of significant importance as a high-purity reference standard and analytical tool for environmental monitoring, toxicological research, and regulatory compliance testing. It is primarily required by analytical laboratories, research institutions, and environmental agencies engaged in the precise identification and quantification of PCB contaminants in various matrices to assess ecological and human health risks.

Application

• Environmental Analysis Reference Standard: Used as a certified reference material (CRM) for calibrating equipment and validating methods in the analysis of soil, water, sediment, and biota samples.
• Toxicological and Metabolic Research: Serves as a pure congener for studying the specific biological effects, persistence, bioaccumulation, and metabolic pathways of highly chlorinated PCBs.
• Regulatory Compliance and Method Development: Essential for developing, verifying, and ensuring compliance with international standards (e.g., EPA, EU) for PCB monitoring and reporting.
• Quality Control/Quality Assurance (QC/QA): Employed in laboratory proficiency testing and as an internal standard to ensure the accuracy and precision of analytical data.
• Forensic and Source Identification Studies: Aids in chemical fingerprinting to trace the source and history of PCB contamination in environmental forensic investigations.
• Material and Product Testing: Used to test the efficiency of remediation technologies and degradation processes aimed at destroying PCBs in contaminated materials.

Basic Information

Product Name	2,2',4,4',6,6'-Hexachlorobiphenyl
CAS No.	33979-03-2
Molecular Formula	C₁₂H₄Cl₆
Molecular Weight	360.88 g/mol
Synonyms	PCB 155; 2,2',4,4',6,6'-HexaCB; 2,2',4,4',6,6'-Hexachlorodiphenyl; Hexachlorobiphenyl (2,2',4,4',6,6'-); Biphenyl, 2,2',4,4',6,6'-hexachloro-; 1,1'-Biphenyl, 2,2',4,4',6,6'-hexachloro-; NSC 406914
EINECS	Contact for details

Quality Control

Our high-purity 2,2',4,4',6,6'-Hexachlorobiphenyl is manufactured and handled under strict quality protocols to ensure identity, purity, and stability for critical analytical applications. Each batch is rigorously characterized using advanced techniques including GC-MS, HPLC, and NMR to confirm congener-specific purity. A comprehensive Certificate of Analysis (COA) detailing purity, chromatographic data, and storage conditions is provided with every shipment to support your traceability and compliance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (typically 15-25°C). For long-term stability, storage at 2-8°C is recommended. The container should be kept in a well-ventilated area designated for research chemicals.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or powder
Identification (IR)	Conforms to structure
Purity (GC)	≥ 98.0% (Congener-specific)
Related Substances (GC)	Total other PCBs ≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., hexane, toluene)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.