Description

2,3,3',4,4',5,6-Heptachlorobiphenyl CAS NO 41411-64-7 is a high-purity, individual congener of the polychlorinated biphenyl (PCB) family, characterized by its specific heptachloro substitution pattern. This compound is of critical importance as a certified reference material and analytical standard for environmental monitoring, toxicological research, and regulatory compliance testing. It is primarily required by analytical laboratories, research institutions, and environmental agencies engaged in the precise quantification and study of persistent organic pollutants (POPs) in complex matrices.

Application

• Certified Reference Standard for the calibration of analytical instruments (GC, GC-MS, HPLC) in environmental testing.
• Analytical Method Development and Validation for the detection and quantification of PCB congeners in soil, water, sediment, and biological samples.
• Toxicological and Ecotoxicological Research to study the environmental fate, bioaccumulation, and specific toxic effects of higher-chlorinated biphenyls.
• Quality Control/Quality Assurance (QC/QA) in commercial laboratories performing compliance testing for regulatory frameworks like the Stockholm Convention, EPA methods, and EU directives.
• Forensic Environmental Analysis for source identification and apportionment in pollution incidents.
• Manufacturing of Calibration Kits and Proficiency Testing Materials for laboratory accreditation programs.

Basic Information

Product Name	2,3,3',4,4',5,6-Heptachlorobiphenyl
CAS No.	41411-64-7
Molecular Formula	C₁₂H₃Cl₇
Molecular Weight	395.32 g/mol
Synonyms	PCB 191; 2,3,3',4,4',5,6-Heptachloro-1,1'-biphenyl; 1,1'-Biphenyl, 2,3,3',4,4',5,6-heptachloro-; Heptachlorobiphenyl (PCB 191); BZ# 191; Congener 191; Aroclor congener 191; 2,3,3',4,4',5,6-HeptaCB
EINECS	Contact for details

Quality Control

Every batch of our 2,3,3',4,4',5,6-Heptachlorobiphenyl is manufactured and handled under strict quality protocols to ensure identity, purity, and stability. Our products are characterized using advanced analytical techniques including GC-FID, GC-MS, and NMR to provide certified purity levels, typically ≥98% (by GC). A comprehensive Certificate of Analysis (COA) is supplied with each product, detailing batch-specific data. We support compliance with ISO 17034 and ISO/IEC 17025 requirements for reference material producers and testing laboratories.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C (refrigerated) or as indicated on the certificate of analysis. For long-term storage under an inert atmosphere, please contact our technical team for specific recommendations.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to structure
Purity (GC)	≥ 98.0%
Related Substances (GC)	Total other PCBs ≤ 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.