Description

3,4'-Dichlorobiphenyl CAS NO 2974-90-5 is a specific chlorinated biphenyl congener of significant interest in industrial and research chemistry. This compound serves as a critical high-purity reference standard and a versatile chemical intermediate for advanced synthesis. It is essential for analytical laboratories, environmental testing facilities, and R&D departments specializing in materials science, electronics, and fine chemical production.

Application

• Environmental Analysis Reference Standard: Primary use as a certified reference material (CRM) for the calibration and validation of analytical methods (GC, GC-MS) to detect and quantify polychlorinated biphenyls (PCBs) in environmental samples (soil, water, air).
• Toxicological & Metabolic Research: Used in scientific studies to investigate the biological fate, metabolic pathways, and toxicological profiles of specific PCB congeners.
• Chemical Synthesis Intermediate: Serves as a building block in organic synthesis for the development of more complex molecules, including specialty polymers and liquid crystals.
• Quality Control & Method Development: Employed by testing laboratories and instrument manufacturers to develop, optimize, and ensure the accuracy of analytical protocols for halogenated organic compounds.
• Regulatory Compliance Testing: Essential for laboratories performing testing to comply with global environmental regulations (e.g., EPA, EU directives) concerning PCB contamination.

Basic Information

Product Name	3,4'-Dichlorobiphenyl
CAS No.	2974-90-5
Molecular Formula	C12H8Cl2
Molecular Weight	223.10 g/mol
Synonyms	PCB 13; 1,2-Dichloro-4-(4-chlorophenyl)benzene; 3,4-Dichlorobiphenyl; 4-(3-Chlorophenyl)-1,2-dichlorobenzene; 3,4'-PCB; Biphenyl, 3,4'-dichloro-; NSC 89286
EINECS	221-030-0

Quality Control

Every batch of our 3,4'-Dichlorobiphenyl is produced and analyzed under strict quality management protocols. We guarantee high chemical purity and lot-to-lot consistency, supported by comprehensive analytical testing including HPLC, GC-MS, and NMR. A detailed Certificate of Analysis (COA) providing identity, purity, and impurity profiles is supplied with each shipment to ensure it meets your research and analytical standards.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Keep away from strong acids and incompatible organic solvents. For long-term storage under an inert atmosphere, please contact us for specific recommendations.

Specification

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