Description

(+)-2,2',3,4,4',6-Hexachlorobiphenyl CAS NO 99554-12-8 is a specific stereoisomer of a polychlorinated biphenyl (PCB) congener, serving as a critical high-purity reference standard for analytical and research purposes. This compound is essential for ensuring accurate calibration, method validation, and trace-level detection in complex matrices. It is primarily required by environmental testing laboratories, regulatory agencies, and academic researchers focused on persistent organic pollutant (POP) analysis, toxicology studies, and method development.

Application

• Environmental Analysis Reference Standard: Used for the calibration of GC-MS, GC-ECD, and HPLC systems in the quantification of PCB contaminants in soil, water, sediment, and biota samples.
• Toxicological Research: Employed in studies investigating the stereospecific metabolism, biological activity, and toxicokinetics of chiral PCB congeners.
• Method Development & Validation: Serves as a critical component for developing and validating new analytical methods for POPs in compliance with EPA, EU, and other international standards.
• Quality Control & Assurance: Acts as an internal standard or spike in laboratory QC protocols to ensure accuracy and precision in routine PCB analysis.
• Regulatory Compliance Testing: Utilized by commercial testing labs to generate data for regulatory submissions and environmental monitoring programs mandated by Stockholm Convention guidelines.
• Certified Reference Material (CRM) Production: Used as a primary material in the preparation of certified reference materials for laboratory proficiency testing and inter-laboratory comparisons.

Basic Information

Product Name	(+)-2,2',3,4,4',6-Hexachlorobiphenyl
CAS No.	99554-12-8
Molecular Formula	C₁₂H₄Cl₆
Molecular Weight	360.88 g/mol
Synonyms	(+)-PCB 139; (+)-2,2',3,4,4',6-HexaCB; 2,2',3,4,4',6-Hexachlorobiphenyl (enantiomer); PCB 139 (enantiomer); BZ# 139; 2,2',3,4,4',6-Hexachloro-1,1'-biphenyl; UNII-Contact for details; Light-sensitive (store away from light)
EINECS	Contact for details

Quality Control

Every batch of (+)-2,2',3,4,4',6-Hexachlorobiphenyl is produced and analyzed under strict quality management protocols to ensure identity, purity, and enantiomeric excess. Our products undergo rigorous quality testing to ensure compliance with industry standards. Certificates of Analysis (COA) are available upon request, providing detailed chromatographic and spectroscopic data, including HPLC/GC purity and chiral purity verification.

Storage

Preserve in a tightly closed container, protected from light. Store at 2-8°C or as indicated on the label/Certificate of Analysis. For long-term storage, keep desiccated at -20°C. Handle and store in accordance with all applicable laboratory safety regulations.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Purity (HPLC/GC)	≥ 98.0%
Enantiomeric Excess (ee)	≥ 99.0%
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.