Description

2,4'-Dichlorobiphenyl CAS NO 34883-43-7 is a specific chlorinated biphenyl congener, a member of the polychlorinated biphenyl (PCB) family, characterized by chlorine atoms at the 2 and 4' positions of the biphenyl ring system. This compound is of significant importance as a high-purity analytical standard and reference material for environmental monitoring, toxicological research, and regulatory compliance testing. It is primarily needed by analytical laboratories, environmental testing facilities, and research institutions engaged in the study and detection of persistent organic pollutants (POPs).

Application

• Environmental Analysis Standard: Used as a certified reference material (CRM) for the calibration and quantification of PCBs in soil, water, sediment, and air samples via GC-MS or GC-ECD.
• Toxicological Research: Serves as a pure congener for studying the specific metabolic pathways, biological effects, and structure-activity relationships (SAR) of individual PCBs.
• Food and Feed Safety Testing: Employed as an analytical standard in the detection and monitoring of PCB contamination in the food chain to ensure regulatory compliance.
• Method Development and Validation: Critical for developing, optimizing, and validating new analytical methods for the separation and identification of complex PCB mixtures (Aroclors).
• Quality Control/Quality Assurance (QC/QA): Acts as a spike or internal standard to assess the accuracy, precision, and recovery of analytical procedures in accredited laboratories.
• Regulatory Compliance and Proficiency Testing: Essential for laboratories participating in inter-laboratory comparison studies and demonstrating competency for regulations like EPA methods.
• Chemical Synthesis Intermediate: Can be used as a building block or precursor in specialized organic synthesis for creating more complex halogenated aromatic compounds for research.
• Educational and Training Purposes: Used in university and professional training settings to teach advanced analytical techniques for persistent organic pollutants.

Basic Information

Product Name	2,4'-Dichlorobiphenyl
CAS No.	34883-43-7
Molecular Formula	C12H8Cl2
Molecular Weight	223.10 g/mol
Synonyms	PCB 8; 1,2'-Dichlorobiphenyl; 2,4'-DCB; Biphenyl, 2,4'-dichloro-; 2-(4-Chlorophenyl)chlorobenzene; NSC 7655; 2,4'-Dichlorodiphenyl
EINECS	Contact for details

Quality Control

Our 2,4'-Dichlorobiphenyl is produced and handled under strict quality protocols to ensure the high purity and consistency required for analytical and research applications. Each batch is rigorously analyzed using advanced techniques including GC-FID, GC-MS, and NMR to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing batch-specific results is provided with every shipment. Our quality system is designed to support GLP (Good Laboratory Practice) and ISO 17025 compliant laboratory work.

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, consider storage under an inert atmosphere such as argon or nitrogen.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to reference
Assay (HPLC/GC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%

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