Description

2,3,4,4'-Tetrachlorobiphenyl is a specific polychlorinated biphenyl (PCB) congener with the CAS number 33025-41-1. This compound is of significant importance in industrial research and analytical chemistry, primarily as a reference standard for environmental monitoring and toxicological studies. It is essential for laboratories and research institutions focused on persistent organic pollutant (POP) analysis, method development, and regulatory compliance testing.

Application

• Analytical Reference Standard: Primary use as a certified standard for the calibration of GC-MS, GC-ECD, and HPLC systems in environmental testing.
• Environmental Monitoring: Critical for the accurate quantification and identification of PCB congeners in soil, water, sediment, and air samples.
• Toxicology Research: Used in studies to understand the specific biological effects, metabolic pathways, and toxicity profiles of individual PCB congeners.
• Method Development & Validation: Serves as a key component in developing and validating analytical methods for POPs according to EPA, EU, and other international standards.
• Quality Control/Assurance: Employed in laboratory QC protocols to ensure the accuracy and precision of PCB analysis in commercial testing services.
• Regulatory Compliance Testing: Essential for industries and consultancies performing due diligence and compliance testing against regulations like the Stockholm Convention.

Basic Information

Product Name	2,3,4,4'-Tetrachlorobiphenyl
CAS No.	33025-41-1
Molecular Formula	C₁₂H₆Cl₄
Molecular Weight	291.99 g/mol
Synonyms	PCB 70; 2,3,4,4'-Tetrachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,3,4,4'-tetrachloro-; 2,3,4,4'-Tetrachlorodiphenyl; 4,4',5,6-Tetrachlorobiphenyl (incorrect but common isomer reference); BZ# 70; Congener 70; Aroclor congener.
EINECS	Contact for details

Quality Control

Every batch of our 2,3,4,4'-Tetrachlorobiphenyl is produced and handled under strict quality protocols to ensure high purity and lot-to-lot consistency, which is critical for its use as an analytical standard. Identity and purity are confirmed via multiple orthogonal techniques including GC-MS and HPLC. A comprehensive Certificate of Analysis (COA) detailing purity, chromatographic data, and storage conditions is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C (refrigerated) for long-term stability. Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation. Store away from strong oxidizers.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Purity (GC-FID/GC-MS)	≥ 98.0% (area %)
Related Substances (HPLC/GC)	Total other PCBs ≤ 2.0%

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