Description

3H-2,1-Benzoxathiole-7-Carbonyl Chloride, 3-Oxo- (9Ci) is a specialized organic intermediate featuring a reactive carbonyl chloride group fused to a benzoxathiole heterocycle. This compound is valued for its role as a key building block in the synthesis of complex molecules, particularly in pharmaceutical and agrochemical research. Its unique structure makes it essential for chemists developing novel active ingredients, where it serves as a precursor for amide and ester formation. Industrial and R&D laboratories rely on this high-purity intermediate to drive innovation in drug discovery and specialty chemical manufacturing.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for compounds targeting central nervous system and metabolic disorders.
• Agrochemical Synthesis: Used in the research and development of advanced herbicides, fungicides, and plant growth regulators.
• Material Science Research: Serves as a monomer or cross-linking agent in the development of specialty polymers with unique optical or electronic properties.
• Organic Synthesis Building Block: Employed in academic and industrial R&D for constructing complex heterocyclic frameworks via its reactive acid chloride functionality.
• Ligand and Catalyst Development: Utilized to create novel chelating agents or organocatalysts for asymmetric synthesis.

Basic Information

Product Name	3H-2,1-Benzoxathiole-7-Carbonyl Chloride, 3-Oxo- (9Ci)
CAS No.	73406-05-0
Molecular Formula	C8H3ClO3S
Molecular Weight	214.62 g/mol
Synonyms	3-Oxo-3H-2,1-benzoxathiole-7-carbonyl chloride; 7-(Chlorocarbonyl)-3-oxo-3H-2,1-benzoxathiole; 3H-2,1-Benzoxathiole-7-carboxylic acid, 3-oxo-, chloride; 3-Oxobenzoxathiole-7-carbonyl chloride; 2,1-Benzoxathiol-3-one-7-carbonyl chloride
EINECS	Contact for details

Quality Control

Every batch of 3H-2,1-Benzoxathiole-7-Carbonyl Chloride, 3-Oxo- (9Ci) is manufactured under strict quality management protocols. Our products undergo rigorous analytical testing, including HPLC, NMR, and IR spectroscopy, to ensure high purity and batch-to-batch consistency suitable for sensitive synthetic applications. Certificates of Analysis (COA) detailing purity, identity, and impurity profiles are provided with each shipment. We adhere to cGMP principles where required, ensuring our intermediates meet the stringent demands of pharmaceutical and advanced chemical synthesis.

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). This compound is hygroscopic (moisture-sensitive) and should be handled under an inert atmosphere (e.g., nitrogen or argon) to prevent decomposition. Keep away from strong acids, bases, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Residue on Ignition	≤ 0.1%

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