Description

2,2',5,5'-Tetrachlorobiphenyl is a specific, high-purity polychlorinated biphenyl (PCB) congener. This compound is of significant importance as a critical reference standard and analytical tool for environmental monitoring and toxicological research. It is primarily needed by analytical laboratories, environmental testing facilities, and research institutions focused on the detection, quantification, and study of persistent organic pollutants (POPs).

Application

• Environmental Analysis Reference Standard: Used as a certified reference material (CRM) for the calibration of GC-MS, GC-ECD, and HPLC systems in the analysis of PCB contamination in soil, water, and sediment.
• Toxicological and Ecotoxicological Research: Serves as a precise congener for studying the biochemical pathways, metabolic fate, and chronic toxicity effects of PCBs in biological systems.
• Food and Feed Safety Testing: Employed as an analytical standard in laboratories to ensure compliance with stringent regulatory limits for PCBs in the food chain.
• Quality Control and Method Development: Essential for developing, validating, and verifying analytical methods according to ISO, EPA, and other international standards.
• Industrial Site Remediation Monitoring: Acts as a key marker compound for assessing the effectiveness of remediation efforts at former industrial sites with PCB contamination.
• Regulatory Compliance and Proficiency Testing: Used by testing bodies and regulatory agencies to prepare samples for laboratory proficiency testing schemes.

Basic Information

Product Name	2,2',5,5'-Tetrachlorobiphenyl
CAS No.	35693-99-3
Molecular Formula	C12H6Cl4
Molecular Weight	291.98 g/mol
Synonyms	PCB 52; 2,2',5,5'-Tetrachloro-1,1'-biphenyl; 2,2',5,5'-Tetrachlorodiphenyl; 2,5,2',5'-Tetrachlorobiphenyl; Aroclor 1254 (Component); Biphenyl, 2,2',5,5'-tetrachloro-; 1,1'-Biphenyl, 2,2',5,5'-tetrachloro-; 2,2',5,5'-TCB
EINECS	Contact for details

Quality Control

Our high-purity 2,2',5,5'-Tetrachlorobiphenyl is produced and handled under strict quality management protocols. Each batch is analyzed to confirm identity and purity, typically using a combination of chromatographic (GC, HPLC) and spectroscopic (MS, NMR) techniques. A comprehensive Certificate of Analysis (COA) is provided, detailing the assay, impurity profile, and confirming suitability for use as a reference material. We support compliance with relevant analytical standards (e.g., EPA, ISO).

Storage

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

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
Assay (HPLC/GC)	≥ 98.0% (Area Percent)
Related Substances (HPLC/GC)	Total impurities ≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., hexane, acetone, methanol)

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