Description

Ethyl Chlorosulfonate is a highly reactive organosulfur compound primarily used as a key sulfonating and chlorosulfonating agent in organic synthesis. Its value lies in its ability to efficiently introduce the chlorosulfonyl (-SO2Cl) group, a crucial precursor for sulfonamides, sulfonate esters, and other valuable intermediates. This makes it an essential raw material for researchers and manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries, where it facilitates the development of active ingredients and functional materials.

Application

• Pharmaceutical Intermediate Synthesis: Key reagent for producing sulfonamide drugs and other active pharmaceutical ingredients (APIs).
• Agrochemical Manufacturing: Used in the synthesis of herbicides, fungicides, and insecticides that contain sulfonylurea or sulfonate groups.
• Dye and Pigment Production: Acts as a sulfonating agent in the manufacture of sulfonated dyes and optical brighteners.
• Polymer and Resin Modification: Employed to introduce sulfonyl chloride groups into polymers for subsequent functionalization.
• Chemical Research & Development: A versatile building block in organic synthesis labs for creating novel sulfonyl-based compounds.
• Surfactant Precursor: Serves as an intermediate in the production of certain anionic surfactants.

Basic Information

Product Name	Ethyl Chlorosulfonate
CAS No.	625-01-4
Molecular Formula	C2H5ClO3S
Molecular Weight	144.58 g/mol
Synonyms	Chlorosulfonic Acid Ethyl Ester; Ethyl Chlorosulfite; Ethoxysulfonyl Chloride; Sulfurochloridic Acid, Ethyl Ester; NSC 8826; Ethyl ester of chlorosulfonic acid
EINECS	210-869-6

Quality Control

Our Ethyl Chlorosulfonate is produced and handled under strict quality management protocols to ensure batch-to-batch consistency and reliability. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as purity, identity, and impurity profiles. Our quality systems are designed to meet the stringent requirements of industrial and research applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases, amines, and oxidizing agents. Due to its reactive nature as a strong acid/organic solvent, it should be kept in a dedicated, corrosion-resistant storage cabinet. Recommended storage temperature is 2-8°C for extended stability.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Density (at 20°C)	1.370 - 1.390 g/mL
Refractive Index (n20/D)	1.415 - 1.425
Water Content (KF)	≤ 0.5%

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