Description

β-Endosulfan is a stereoisomer of the organochlorine insecticide Endosulfan, identified by the CAS number 33213-65-9. This compound is a critical reference standard and analytical reagent for environmental monitoring, toxicology research, and regulatory compliance testing. It is primarily required by analytical laboratories, agrochemical manufacturers, and research institutions focused on pesticide residue analysis and environmental fate studies.

Application

• Analytical Reference Standard: Primary use as a certified standard for the calibration of equipment (GC, GC-MS, HPLC) in pesticide residue analysis.
• Environmental Monitoring: Detection and quantification of Endosulfan isomers in soil, water, and air samples for environmental impact assessments.
• Toxicological Research: Used in studies investigating the metabolism, persistence, and toxic effects of organochlorine pesticides.
• Quality Control (QC): Serves as an internal standard for the quality assurance of technical-grade Endosulfan and its formulations.
• Regulatory Compliance: Essential for testing laboratories to validate methods and ensure compliance with global regulations (e.g., EPA, EU MRLs) concerning banned or restricted substances.
• Method Development: A key reagent in developing and optimizing new analytical methods for chlorinated hydrocarbon detection.

Basic Information

Product Name	β-Endosulfan
CAS No.	33213-65-9
Molecular Formula	C9H6Cl6O3S
Molecular Weight	406.93 g/mol
Synonyms	Endosulfan II; β-Endosulfan; Endosulfan B; 6,7,8,9,10,10-Hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin-3-oxide (β-isomer); Thiodan® (component); Benzoepin (component); 1,4,5,6,7,7-Hexachloro-5-norbornene-2,3-dimethanol cyclic sulfite (β-isomer)
EINECS	251-375-4

Quality Control

Our β-Endosulfan is produced and handled under strict quality protocols to ensure high purity and stability for analytical applications. Each batch is analyzed using validated chromatographic methods (HPLC, GC) to confirm identity and purity. A comprehensive Certificate of Analysis (COA) detailing assay, isomer specificity, and impurity profile is provided with every shipment to support your quality assurance and regulatory documentation.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at a controlled room temperature (15-25°C). Keep away from strong bases and incompatible organic solvents. For long-term storage under optimal conditions, consider storing at 2-8°C.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Isomer Specificity (β-isomer)	≥ 99.0% of total Endosulfan
Related Substances (HPLC)	Total impurities ≤ 2.0%
Loss on Drying	≤ 0.5%

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