Description

3,3',4,4',5,5'-Hexachlorobiphenyl is a specific, high-purity congener of polychlorinated biphenyls (PCBs). This compound is of significant importance for research, analytical, and regulatory purposes, serving as a critical reference standard. It is primarily needed by analytical laboratories, environmental testing facilities, and chemical manufacturers engaged in method development, quality control, and compliance testing. The availability of a well-characterized standard is essential for accurate identification and quantification in complex matrices.

Application

• Analytical Reference Standard: Primary use as a certified standard for gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) in environmental analysis.
• Environmental Monitoring: Calibration and quantification of PCB congeners in soil, water, sediment, and air samples to assess contamination levels.
• Method Development & Validation: Used by testing laboratories to develop, optimize, and validate analytical methods for persistent organic pollutants (POPs).
• Toxicological Research: Serves as a precise congener for studying the biochemical and toxicological effects of specific PCB structures.
• Regulatory Compliance Testing: Essential for laboratories performing testing to comply with international regulations such as the Stockholm Convention on POPs.
• Quality Control Material: Used as a spike or control material in laboratory proficiency testing and internal quality assurance programs.
• Chemical Synthesis Intermediate: May be used in specialized organic synthesis for creating derivatives or labeled compounds for research.

Basic Information

Product Name	3,3',4,4',5,5'-Hexachlorobiphenyl
CAS No.	32774-16-6
Molecular Formula	C12H4Cl6
Molecular Weight	360.88 g/mol
Synonyms	PCB 169; 3,3',4,4',5,5'-HexaCB; 2,2',3,3',4,4',5,5'-Octachlorobiphenyl (incorrect numbering correction); Hexachlorobiphenyl (mixed isomers); Biphenyl, 3,3',4,4',5,5'-hexachloro-; 1,1'-Biphenyl, 3,3',4,4',5,5'-hexachloro-; Aroclor congener 169 (historical reference)
EINECS	Contact for details

Quality Control

Our high-purity 3,3',4,4',5,5'-Hexachlorobiphenyl is produced and handled under strict quality protocols to ensure batch-to-batch consistency and reliability for critical analytical applications. Each batch is analyzed using validated methods, including GC-FID/ECD and GC-MS, to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing purity, chromatographic data, and storage recommendations is provided with every shipment. We support compliance with ISO/IEC 17025 standards for testing and calibration laboratories.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). This compound is light-sensitive (store away from light). For long-term storage, consider storage under inert atmosphere at lower temperatures (-20°C) to maximize stability. Keep away from heat and open flame.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to reference spectrum
Identification (GC-MS)	Conforms to reference retention time and mass spectrum
Purity (GC)	≥ 98.0% (area percent)
Related Substances (GC)	Total other PCB congeners ≤ 1.5%
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.