Description

2,3,3',5-Tetrachlorobiphenyl CAS NO 70424-67-8 is a specific congener of polychlorinated biphenyls (PCBs), a class of synthetic organic chemicals. This high-purity reference standard is critical for analytical research, environmental monitoring, and regulatory compliance testing. It is primarily needed by analytical laboratories, environmental testing facilities, and chemical manufacturers engaged in the development of detection methods or remediation technologies for persistent organic pollutants (POPs).

Application

• Analytical Reference Standard: Used as a certified standard for the calibration of instruments (GC-MS, HPLC) in the quantification of PCB congeners in complex matrices.
• Environmental Analysis: Essential for testing soil, water, sediment, and biota samples to assess contamination levels and monitor compliance with international regulations like the Stockholm Convention.
• Toxicological Research: Serves as a pure substance for studying the specific biological effects, metabolic pathways, and environmental fate of individual PCB congeners.
• Method Development & Validation: Used by laboratories to develop, optimize, and validate new analytical methods for the separation and detection of PCBs.
• Quality Control/Assurance: Employed as an internal standard or spike in QA/QC protocols to ensure the accuracy and precision of analytical data in commercial testing labs.
• Regulatory Compliance: Supports industries, such as waste management and manufacturing, in testing their emissions, effluents, and products to meet legal limits for PCBs.

Basic Information

Product Name	2,3,3',5-Tetrachlorobiphenyl
CAS No.	70424-67-8
Molecular Formula	C12H6Cl4
Molecular Weight	291.99 g/mol
Synonyms	PCB 44; 2,3,3',5-Tetrachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,3,3',5-tetrachloro-; 2,3,3',5-TCB; Biphenyl, 2,3,3',5-tetrachloro-; Tetrachlorobiphenyl (2,3,3',5-); IUPAC Name: 1,2,3-Trichloro-5-(3-chlorophenyl)benzene (alternative numbering)
EINECS	Contact for details

Quality Control

Every batch of 2,3,3',5-Tetrachlorobiphenyl is produced and handled under strict quality management protocols. The material undergoes rigorous identity confirmation and purity analysis using advanced chromatographic and spectroscopic techniques to ensure it meets the high standards required for reference materials. A comprehensive Certificate of Analysis (COA) detailing purity, analytical methods, and batch-specific data is provided with each shipment to support your traceability and compliance needs.

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 under inert atmosphere (e.g., argon or nitrogen) in a freezer (-20°C) is recommended. Keep away from strong oxidizers.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC/GC)	≥ 98.0% (Area %)
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility	Soluble in common organic solvents (e.g., acetone, hexane, methanol)

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