Description

Benzoic Acid, 2-(Chlorosulfonyl)-, Ethyl Ester (9Ci) is a specialized organic sulfonyl chloride derivative, serving as a versatile and reactive synthetic intermediate in advanced chemical synthesis. Its core value lies in its ability to introduce the chlorosulfonyl functional group, a key precursor for sulfonamides and other sulfonyl-containing compounds, enabling the development of complex molecular architectures. This high-purity intermediate is essential for research and production in the pharmaceutical and agrochemical industries, where precise and reliable building blocks are critical for innovation.

Application

• Pharmaceutical Intermediate: A key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and insecticides that incorporate sulfonylurea or sulfonamide moieties.
• Dye and Pigment Manufacturing: Serves as a precursor for sulfonated dyes and specialty colorants.
• Polymer Chemistry: Employed in the modification of polymers and the creation of functional materials with specific surface properties.
• Chemical Research & Development: A valuable reagent for medicinal chemistry and process development in laboratory-scale and pilot-scale operations.
• Custom Synthesis: Used by fine chemical manufacturers for contract synthesis and the production of tailored organic molecules.

Basic Information

Product Name	Benzoic Acid, 2-(Chlorosulfonyl)-, Ethyl Ester (9Ci)
CAS No.	103008-54-4
Molecular Formula	C9H9ClO4S
Molecular Weight	248.68 g/mol
Synonyms	Ethyl 2-(Chlorosulfonyl)benzoate; 2-(Chlorosulfonyl)benzoic Acid Ethyl Ester; Benzoic acid, 2-(chlorosulfonyl)-, ethyl ester; Ethyl o-(chlorosulfonyl)benzoate; NSC 405124; o-Carbethoxybenzenesulfonyl chloride
EINECS	Contact for details

Quality Control

Our Benzoic Acid, 2-(Chlorosulfonyl)-, Ethyl Ester (9Ci) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and identity confirmation, to ensure it meets the high standards required for synthetic applications. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated place at room temperature (15-25°C). Keep away from incompatible materials such as strong bases, amines, and alcohols. Due to its reactivity as a strong acid/organic solvent derivative, ensure containers are kept tightly sealed to prevent moisture ingress and decomposition.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Purity (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

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