Description

2,1,3-Benzoxadiazole-4-Carbonyl Chloride (9Ci) is a high-purity, reactive chemical intermediate featuring a benzoxadiazole core activated by a carbonyl chloride group. This compound is critical for the synthesis of complex molecules, particularly in advanced pharmaceutical and agrochemical research where precise functionalization is required. It is primarily sought by R&D chemists and process development scientists in the life sciences and specialty chemical sectors for constructing novel heterocyclic scaffolds and active ingredients.

Application

• Pharmaceutical Intermediate: A key building block for the synthesis of novel drug candidates, particularly those targeting neurological and oncological pathways.
• Agrochemical Synthesis: Used in the research and development of new herbicides, fungicides, and insecticides with enhanced activity.
• Material Science Research: Serves as a precursor for creating functional polymers, dyes, and advanced organic electronic materials.
• Bioconjugation & Probe Development: Utilized in biochemical research to create fluorescent probes or affinity labels due to its reactive acyl chloride moiety.
• Academic & Contract Research: Employed in university and CRO laboratories for methodological development and exploring new chemical spaces.

Basic Information

Product Name	2,1,3-Benzoxadiazole-4-Carbonyl Chloride (9Ci)
CAS No.	111595-71-2
Molecular Formula	C7H3ClN2O2
Molecular Weight	182.56 g/mol
Synonyms	4-Chlorocarbonyl-2,1,3-benzoxadiazole; Benzofurazan-4-carbonyl chloride; 2,1,3-Benzoxadiazole-4-carboxylic acid chloride; 4-Benzofurazancarbonyl chloride; 1,2,5-Oxadiazolo[3,4-c]pyridine-6-carbonyl chloride; 4-Carboxybenzofurazan chloride; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our 2,1,3-Benzoxadiazole-4-Carbonyl Chloride is manufactured under strict quality management systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and NMR/IR for structural confirmation, to ensure it meets the stringent requirements of research and development applications. A Certificate of Analysis (COA) detailing all specifications is provided with every shipment.

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 product 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	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Purity (HPLC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Solubility	Soluble in common organic solvents (DMF, THF, DCM)

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