Description

(-)-2,2',3,4,4',6-Hexachlorobiphenyl CAS NO 99554-13-9 is a specific enantiomer of a hexachlorinated biphenyl congener, valued as a high-purity analytical reference standard. This compound is critical for research and regulatory compliance, enabling precise calibration and method validation in analytical chemistry. It is primarily required by environmental testing laboratories, academic researchers, and quality control departments in industries monitoring persistent organic pollutants (POPs).

Application

• Analytical Reference Standard: Primary use for calibrating GC-MS, HPLC, and other analytical instruments for accurate quantification of PCB congeners.
• Environmental Analysis: Essential for testing soil, water, sediment, and biota samples to assess contamination levels and comply with environmental regulations (e.g., Stockholm Convention).
• Toxicological Research: Used in studies investigating the stereoselective metabolism, toxicity, and environmental fate of chiral PCB congeners.
• Method Development & Validation: Serves as a critical component in developing and verifying new analytical protocols for PCB detection and separation.
• Quality Assurance/Quality Control (QA/QC): Employed as an internal standard or spike in laboratory proficiency testing and quality control programs.
• Regulatory Compliance Testing: Used by commercial laboratories to provide certified testing services for industrial clients requiring regulatory compliance reports.

Basic Information

Item	Detail
Product Name	(-)-2,2',3,4,4',6-Hexachlorobiphenyl
CAS No.	99554-13-9
Molecular Formula	C₁₂H₄Cl₆
Molecular Weight	360.88 g/mol
Synonyms	(-)-PCB 139; (-)-2,2',3,4,4',6-HexaCB; PCB 139 (enantiomer); 2,2',3,4,4',6-Hexachlorobiphenyl (specific enantiomer); 1,1'-Biphenyl, 2,2',3,4,4',6-hexachloro-, (1R)-; Chiral Hexachlorobiphenyl Standard; Hexachlorobiphenyl Congener 139 (enantiopure)
EINECS	Contact for details

Quality Control

Our high-purity reference materials are produced and handled under strict quality management protocols. Each batch of (-)-2,2',3,4,4',6-Hexachlorobiphenyl is characterized using advanced analytical techniques including chiral HPLC and GC-MS to confirm enantiomeric purity and chemical identity. A comprehensive Certificate of Analysis (COA) is provided, detailing the results for assay, enantiomeric excess, and purity. We ensure traceability and consistency to support your critical research and compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C in a cool, dry, and well-ventilated place. For long-term storage, consider storage at -20°C under an inert atmosphere. Keep away from strong acids and organic solvents.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (HPLC/GC-MS)	Conforms to reference standard
Purity (HPLC)	≥ 98.0%
Enantiomeric Excess (ee)	≥ 99.0%
Solubility	Soluble in common organic solvents (e.g., acetone, hexane, methanol)

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