Description

2,3,5,6-Tetrachlorobiphenyl is a specific, high-purity congener of polychlorinated biphenyls (PCBs) identified by CAS NO 33284-54-7. This compound is of significant value as a critical analytical standard and reference material for environmental monitoring, toxicological research, and regulatory compliance testing. It is primarily required by analytical laboratories, research institutions, and environmental agencies involved in the precise quantification and study of PCB contamination in various matrices.

Application

• Environmental Analysis Standard: Used as a certified reference material (CRM) for calibrating instruments and validating methods in the analysis of soil, water, sediment, and biota samples for PCB contamination.
• Toxicological Research: Serves as a pure congener standard in studies investigating the specific toxicokinetics, metabolic pathways, and health effects of individual PCB compounds.
• Food Safety Testing: Employed as a calibration standard in laboratories monitoring PCB residues in food products, animal feed, and edible oils to ensure regulatory compliance.
• Quality Control & Method Development: Essential for developing, optimizing, and verifying analytical procedures (e.g., GC-MS, GC-ECD) in commercial and regulatory testing laboratories.
• Industrial Hygiene Monitoring: Used in the preparation of standard solutions for air and workplace surface monitoring in industries dealing with historical PCB-containing equipment.
• Forensic and Diagnostic Applications: Acts as a reference compound in forensic analysis and diagnostic tests related to poisoning or exposure incidents.

Basic Information

Product Name	2,3,5,6-Tetrachlorobiphenyl
CAS No.	33284-54-7
Molecular Formula	C12H6Cl4
Molecular Weight	291.99 g/mol
Synonyms	PCB 65; 2,3,5,6-Tetrachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,3,5,6-tetrachloro-; 2,3,5,6-TCB; Tetrachlorobiphenyl (2,3,5,6-); Biphenyl, 2,3',5,6'-tetrachloro-; NSC 89344
EINECS	Contact for details

Quality Control

Our 2,3,5,6-Tetrachlorobiphenyl is produced and handled under strict quality management protocols. Each batch undergoes rigorous analytical testing, including identity confirmation by GC-MS and purity assessment by HPLC, to ensure it meets the high standards required for reference materials. A comprehensive Certificate of Analysis (COA) detailing batch-specific purity, chromatographic data, and trace solvent levels is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Keep away from strong acids and organic solvents. For long-term stability, storage under an inert atmosphere such as argon or nitrogen is recommended.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to reference spectrum
Identification (GC-MS)	Conforms to reference retention time and mass spectrum
Purity (HPLC)	≥ 98.0% (Area %)
Related Substances (HPLC)	Total other PCB congeners ≤ 1.5%
Residual Solvents (GC)	Meets ICH guidelines

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