Description

2,4-Dichlorobiphenyl CAS NO 33284-50-3 is a specific chlorinated derivative of biphenyl, valued as a key intermediate and reference standard in advanced chemical synthesis and analytical research. This compound is critical for applications requiring a defined polychlorinated biphenyl (PCB) congener, particularly in environmental testing and material science development. It serves the needs of research laboratories, analytical service providers, and specialty chemical manufacturers engaged in method development, calibration, and the synthesis of complex organic molecules.

Application

• Analytical Reference Standard: Primary use as a certified reference material (CRM) for the calibration of GC-MS, HPLC, and other analytical instruments in environmental pollutant analysis.
• Environmental Research: Critical component in studies monitoring and quantifying PCB contamination in soil, water, and biological samples.
• Chemical Synthesis Intermediate: Serves as a building block for the preparation of more complex PCB derivatives or other specialty aromatic compounds in organic chemistry R&D.
• Toxicological Studies: Used in laboratory research to investigate the biological effects, metabolism, and environmental fate of specific PCB congeners.
• Method Development & Validation: Essential for developing, optimizing, and validating analytical methods in compliance with EPA, EU, and other international regulatory guidelines for persistent organic pollutants (POPs).
• Quality Control Material: Employed as a spike or control sample in laboratory quality assurance/quality control (QA/QC) protocols for environmental testing laboratories.

Basic Information

Product Name	2,4-Dichlorobiphenyl
CAS No.	33284-50-3
Molecular Formula	C₁₂H₈Cl₂
Molecular Weight	223.10 g/mol
Synonyms	PCB 7; 1,2'-Dichlorobiphenyl; 2,4-Dichloro-1,1'-biphenyl; 2,4-DCB; Biphenyl, 2,4-dichloro-; 2,4-Dichlorodiphenyl
EINECS	Contact for details

Quality Control

Our 2,4-Dichlorobiphenyl is produced and handled under strict quality management protocols. Each batch is analytically verified to ensure high purity and congener specificity, suitable for use as a reference standard. Comprehensive testing includes identity confirmation by spectroscopic methods and purity determination by chromatographic techniques. A Certificate of Analysis (COA) detailing batch-specific results is provided with every shipment to support your traceability and compliance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to reference spectrum
Purity (HPLC/GC)	≥ 98.0%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Melting Point	Contact for details

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