Description

2,3',4,4',5',6-Hexachlorobiphenyl is a specific, high-purity congener of polychlorinated biphenyls (PCBs). This compound is of significant importance as a certified reference material and analytical 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 quality control.

Application

• Certified Reference Standard for the calibration of analytical instruments (GC, GC-MS, HPLC) in environmental testing.
• Analytical Method Development and Validation for the precise detection and quantification of PCB congeners in complex matrices.
• Quality Control (QC) and Quality Assurance (QA) in laboratories performing EPA, EU, and other international standard methods for POPs.
• Toxicological and Ecotoxicological Research to study the environmental fate, bioaccumulation, and specific toxic effects of individual PCB congeners.
• Regulatory Compliance Testing for monitoring PCB levels in soil, water, sediment, waste, and biological tissues to meet global regulatory limits.
• Production of In-House Reference Materials and proficiency testing samples for laboratory accreditation schemes.

Basic Information

Product Name	2,3',4,4',5',6-Hexachlorobiphenyl
CAS No.	74472-43-8
Molecular Formula	C₁₂H₄Cl₆
Molecular Weight	360.88 g/mol
Synonyms	PCB 138; 2,3,4,2',4',5'-Hexachlorobiphenyl (alternative numbering); 2,3',4,4',5',6-Hexachloro-1,1'-biphenyl; BZ# 138; IUPAC Name: 1,2,3,4-Tetrachloro-5-(2,4,5-trichlorophenyl)benzene; Polychlorinated Biphenyl 138; Hexachlorobiphenyl (mixed isomers); Aroclor congener 138
EINECS	Contact for details

Quality Control

As a high-grade reference material, our 2,3',4,4',5',6-Hexachlorobiphenyl is manufactured and verified under strict quality protocols. Each batch is characterized using advanced analytical techniques including GC-FID, GC-MS, and NMR to confirm identity and purity. We provide comprehensive Certificates of Analysis (COA) detailing exact congener purity, impurity profiles, and uncertainty measurements, supporting traceability to NIST or other recognized standards where applicable.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (typically 15-25°C). For long-term stability, storage at 2-8°C is recommended. Keep the container sealed in a well-ventilated area.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or powder
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to reference spectrum
Purity (GC-FID)	≥ 98.0% (Congener-specific)
Related Substances (GC)	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.