Description

2,2',3,4,4'-Pentachlorobiphenyl is a specific congener of polychlorinated biphenyls (PCBs), a well-studied class of synthetic organic chemicals. This compound is primarily utilized as a critical analytical reference standard for environmental monitoring, toxicological research, and regulatory compliance testing. It serves researchers and quality control laboratories in the environmental, analytical chemistry, and industrial hygiene sectors who require high-purity, well-characterized materials for precise measurement and calibration.

Application

• Environmental Analysis Reference Standard: Primary use as a certified standard for the quantification of PCB congeners in soil, water, sediment, and air samples via GC-MS or GC-ECD.
• Toxicological and Biomedical Research: Used in studies investigating the metabolism, distribution, and health effects of specific PCB congeners.
• Method Development and Validation: Essential for developing, calibrating, and validating analytical methods in compliance with EPA, EU, and other international protocols.
• Quality Assurance/Quality Control (QA/QC): Serves as an internal standard or spike for recovery studies in laboratory proficiency testing and accreditation processes.
• Regulatory Compliance Testing: Used by industrial and commercial laboratories to test materials and products for PCB contamination to meet TSCA, POPs, and other regulatory limits.
• Forensic and Source Identification Studies: Aids in chemical fingerprinting to identify the source and history of PCB contamination in environmental forensics.

Basic Information

Product Name	2,2',3,4,4'-Pentachlorobiphenyl
CAS No.	65510-45-4
Molecular Formula	C₁₂H₅Cl₅
Molecular Weight	326.43 g/mol
Synonyms	PCB 138; 2,2',3,4,4'-Pentachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,2',3,4,4'-pentachloro-; Pentachlorobiphenyl (IUPAC); BZ# 138; Congener 138; 2,3,4,2',4'-Pentachlorobiphenyl; Aroclor congener 138
EINECS	Contact for details

Quality Control

Our high-purity reference standards are produced and verified under strict quality management protocols. Each batch is characterized using advanced analytical techniques including GC-MS, HPLC, and NMR to confirm identity and purity. A comprehensive Certificate of Analysis (COA) is provided, detailing the certified purity level, analytical methods, and batch-specific chromatographic data. We support compliance with ISO/IEC 17025 and relevant pharmacopeial guidelines for reference materials.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C in a cool, dry, and well-ventilated place. Keep away from strong acids and organic solvents. For long-term stability, storage under an inert atmosphere is recommended.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or powder
Identification (IR)	Conforms to reference spectrum
Identification (GC-MS)	Retention time and mass spectrum conform to reference standard
Purity (HPLC/GC)	≥98.0% (Area %)
Related Substances (HPLC)	Total other PCB congeners ≤2.0%
Solubility	Soluble in common organic solvents (e.g., hexane, toluene, acetone)

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