Description

2,3,4',5-Tetrachlorobiphenyl CAS NO 74472-34-7 is a specific congener of polychlorinated biphenyls (PCBs), a well-studied class of synthetic organic chemicals. This compound serves as a critical reference standard and analytical standard 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.

Application

• Analytical Reference Standard: Used as a certified standard for calibrating equipment like GC-MS and HPLC in environmental analysis.
• Environmental Monitoring: Essential for testing and quantifying PCB contamination levels in soil, water, sediment, and air samples to meet regulatory standards.
• Toxicological Research: Employed in laboratory studies to investigate the metabolism, environmental fate, and specific health effects of PCB congeners.
• Food and Feed Safety Testing: Used as a standard in the analysis of PCB residues in food products, animal feed, and edible oils to ensure safety compliance.
• Method Development and Validation: Critical for developing, optimizing, and validating new analytical methods for PCB detection and separation.
• Quality Control/Assurance: Serves as an internal standard or spike in laboratory QC procedures to ensure accuracy and precision of analytical results.
• Regulatory Compliance: Supports testing mandated by agencies worldwide (e.g., EPA, EU directives) concerning PCB pollution and remediation.

Basic Information

Product Name	2,3,4',5-Tetrachlorobiphenyl
CAS No.	74472-34-7
Molecular Formula	C₁₂H₆Cl₄
Molecular Weight	291.99 g/mol
Synonyms	PCB 70; 2,3,4',5-Tetrachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,3,4',5-tetrachloro-; 2,3,4',5-TCB; Tetrachlorobiphenyl (IUPAC); BZ# 70; Aroclor congener 70; 2,3,4',5-Polychlorinated Biphenyl
EINECS	Contact for details

Quality Control

Every batch of our 2,3,4',5-Tetrachlorobiphenyl is produced and handled under strict quality protocols to ensure high purity, stability, and traceability. Our products undergo rigorous quality testing, including chromatographic purity analysis, to ensure compliance with industry standards for analytical reference materials. A comprehensive Certificate of Analysis (COA) detailing batch-specific purity, identity confirmation, and analytical data is provided with each 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 (typically 15-25°C). Keep away from strong acids and organic solvents. For long-term stability, consider storage under inert atmosphere at lower temperatures (e.g., 2-8°C).

Specification

Item	Specification
Appearance	White to off-white crystalline solid or powder
Identification (IR)	Conforms to structure
Purity (GC or HPLC)	≥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.