Description

3,3',4,4'-Tetrachlorobiphenyl is a specific, high-purity congener of polychlorinated biphenyls (PCBs). This compound is of significant importance as a critical analytical reference standard for environmental monitoring, toxicological research, and regulatory compliance testing. It is primarily needed by analytical laboratories, environmental testing facilities, and research institutions focused on persistent organic pollutant (POP) analysis, method development, and calibration.

Application

• Analytical Reference Standard: Primary use as a certified standard for the quantitative and qualitative analysis of PCBs in environmental samples (soil, water, sediment) and biological matrices.
• Environmental Monitoring & Forensics: Calibration of GC-MS, GC-ECD, and HPLC systems for tracking PCB contamination sources and assessing remediation efforts.
• Toxicological & Biomedical Research: Used in studies investigating the biochemical pathways, metabolic fate, and health effects of specific PCB congeners.
• Regulatory Compliance Testing: Essential for laboratories performing tests to comply with international regulations like the Stockholm Convention on POPs, EPA methods (e.g., 8082), and other global environmental directives.
• Method Development & Validation: Serves as a key component in developing, optimizing, and validating new analytical methods for PCB detection and quantification.
• Quality Control & Proficiency Testing: Used in internal QC programs and external proficiency testing schemes to ensure accuracy and reliability of laboratory data.

Basic Information

Product Name	3,3',4,4'-Tetrachlorobiphenyl
CAS No.	32598-13-3
Molecular Formula	C12H6Cl4
Molecular Weight	291.99 g/mol
Synonyms	PCB 77; 3,3',4,4'-Tetrachloro-1,1'-biphenyl; 3,4,3',4'-Tetrachlorobiphenyl; Tetrachlorobiphenyl (3,3',4,4'-); 1,1'-Biphenyl, 3,3',4,4'-tetrachloro-; Aroclor 1242 (Component); IUPAC Name: 1,1'-Biphenyl, 3,3',4,4'-tetrachloro-
EINECS	251-117-1

Quality Control

Our 3,3',4,4'-Tetrachlorobiphenyl is manufactured and handled under strict quality systems to ensure the integrity required for analytical applications. Each batch is rigorously tested using advanced chromatographic and spectroscopic techniques to confirm identity, purity, and congener specificity. A comprehensive Certificate of Analysis (COA) is provided, detailing purity (typically ≥98% by GC), chromatographic profile, and trace solvent residues. We support compliance with ISO/IEC 17025 standards for testing and calibration laboratories.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C (refrigerated) for long-term stability. The container should be kept in a dry, well-ventilated area designated for laboratory chemicals. Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or solution (as specified)
Identification (IR / NMR)	Conforms to reference spectrum
Purity (GC-FID / GC-MS)	≥ 98.0% (Area %)
Related Substances (GC)	Total other PCB congeners < 2.0%
Solvent Content (GC)	As per grade (e.g., <0.5% for neat solid)
Water Content (KF)	< 0.5% w/w

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