Description

2,2',3,3',5,6-Hexachlorobiphenyl is a specific congener of polychlorinated biphenyls (PCBs), a well-studied class of synthetic organic chemicals. This compound is of significant importance for analytical and research purposes, serving as a critical reference standard for environmental monitoring, toxicological studies, and regulatory compliance testing. It is primarily needed by analytical laboratories, environmental testing facilities, and research institutions focused on persistent organic pollutant (POP) analysis, method development, and quality control.

Application

• Analytical Reference Standard: Primary use as a certified reference material (CRM) for the calibration of analytical instruments like GC-MS and HPLC.
• Environmental Analysis: Quantification and confirmation of PCB congeners in soil, water, sediment, and air samples for environmental impact assessments.
• Food and Feed Safety Testing: Used in methods to detect and quantify PCB residues to ensure compliance with food safety regulations (e.g., EU, FDA).
• Toxicological Research: Serves as a precise standard in studies investigating the metabolism, bioaccumulation, and specific toxic effects of individual PCB congeners.
• Method Development and Validation: Essential for developing, optimizing, and validating new analytical protocols for PCB detection and separation.
• Quality Assurance/Quality Control (QA/QC): Used as an internal or external standard to ensure the accuracy and precision of laboratory testing procedures.
• Regulatory Compliance: Supports testing mandated by regulations such as the Stockholm Convention on POPs, EPA methods, and other international directives.

Basic Information

Product Name	2,2',3,3',5,6-Hexachlorobiphenyl
CAS No.	52704-70-8
Molecular Formula	C₁₂H₄Cl₆
Molecular Weight	360.88 g/mol
Synonyms	PCB 136; 2,2',3,3',5,6-Hexachlorobiphenyl; 2,2',3,3',5,6-HexaCB; 2,2',3,3',5,6-Hexachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,2',3,3',5,6-hexachloro-; Biphenyl, 2,2',3,3',5,6-hexachloro-; Hexachlorobiphenyl (mixed isomers)
EINECS	Contact for details

Quality Control

Our high-purity 2,2',3,3',5,6-Hexachlorobiphenyl is produced and handled under strict quality management protocols. Each batch is rigorously analyzed using advanced chromatographic and spectroscopic techniques to ensure identity, purity, and stability. A comprehensive Certificate of Analysis (COA) is provided, detailing assay purity, congener-specific identity confirmation, and solvent residue levels where applicable. Our quality system supports traceability and meets the exacting standards required for analytical reference materials.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). For long-term stability, storage at 2-8°C is recommended. Keep the container securely sealed in a well-ventilated area and away from incompatible materials.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR / NMR)	Conforms to structure
Assay (HPLC / GC)	≥ 98.0% (Area Percent)
Purity (GC-FID/ECD)	≥ 97.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solvent Residue (GC)	Complies with ICH guidelines
Water Content (KF)	≤ 0.5% w/w

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