Description

2,2',3,3',4,5,6'-Heptachlorobiphenyl CAS NO 38411-25-5 is a specific, high-purity congener of polychlorinated biphenyls (PCBs). This compound is of significant importance for analytical and research purposes, serving as a critical reference standard for environmental monitoring and toxicological studies. It is primarily needed by analytical laboratories, environmental testing facilities, and research institutions focused on persistent organic pollutant (POP) analysis, regulatory compliance, and method development.

Application

• Environmental Analysis Reference Standard: Used as a certified reference material (CRM) for the quantification and identification of PCB congeners in soil, water, sediment, and biota samples.
• Toxicological Research: Serves as a precise standard in studies investigating the metabolism, bioaccumulation, and specific toxic effects of heptachlorinated biphenyl isomers.
• Method Development and Validation: Essential for developing, calibrating, and validating analytical methods such as GC-MS, GC-ECD, and HRGC/HRMS for PCB analysis.
• Quality Control and Assurance: Employed in laboratory QC protocols to ensure accuracy, precision, and compliance with standards like EPA Method 8082A.
• Regulatory Compliance Testing: Used to calibrate equipment for testing products and materials to ensure they meet global restrictions on PCBs (e.g., Stockholm Convention, TSCA).
• Forensic and Source Identification Studies: Aids in chemical fingerprinting to trace the source and history of PCB contamination in environmental forensic investigations.

Basic Information

Product Name	2,2',3,3',4,5,6'-Heptachlorobiphenyl
CAS No.	38411-25-5
Molecular Formula	C₁₂H₃Cl₇
Molecular Weight	395.32 g/mol
Synonyms	PCB 174; 2,2',3,3',4,5,6-Heptachlorobiphenyl; 2,2',3,3',4,5,6'-Heptachloro-1,1'-biphenyl; Biphenyl, 2,2',3,3',4,5,6'-heptachloro-; Heptachlorobiphenyl (PCB 174); 1,1'-Biphenyl, 2,2',3,3',4,5,6'-heptachloro-; Aroclor congener 174 (representative)
EINECS	Contact for details

Quality Control

Our high-purity reference standards are produced and verified under strict quality management protocols. Each batch of 2,2',3,3',4,5,6'-Heptachlorobiphenyl is characterized using advanced analytical techniques including GC-MS, NMR, and HPLC to ensure identity, purity, and stability. We provide comprehensive Certificates of Analysis (COA) detailing lot-specific data, traceable to primary standards. Our quality system supports compliance with relevant guidelines for reference materials.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C. For long-term storage, keep the container under an inert atmosphere in a freezer (-20°C). Allow the vial to reach room temperature in a desiccator before opening to prevent moisture condensation.

Specification

Item	Specification
Appearance	White to off-white crystalline solid or neat oil
Identification (IR)	Conforms to structure
Identification (GC-MS)	Conforms to reference
Purity (GC-FID/GC-ECD)	≥ 98.0% (area percent)
Related Substances (HPLC/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.