Description

Chlorosulfonic Acid CAS NO 7790-94-5 is a highly reactive and versatile sulfonating and chlorosulfonating agent essential for industrial synthesis. Its primary value lies in its ability to introduce the sulfonyl chloride group, a key intermediate for manufacturing a wide range of specialty chemicals. This strong acid is critically needed by manufacturers in the agrochemical, pharmaceutical, dye, and detergent industries for producing sulfonamides, surfactants, and other functional compounds.

Application

• Sulfonamide Synthesis: A key reagent for producing pharmaceutical intermediates and active ingredients, including certain antibiotics and diuretics.
• Surfactant & Detergent Manufacturing: Used in the sulfonation of organic compounds to create anionic surfactants for industrial and household cleaning products.
• Dye and Pigment Production: Employed as a sulfonating agent in the synthesis of various sulfonated dyes and colorants.
• Agrochemical Intermediates: Crucial for manufacturing sulfonylurea herbicides and other crop protection agents.
• Chemical Synthesis Reagent: Serves as a powerful chlorinating and dehydrating agent in various organic transformations and polymer modifications.
• Catalyst and Specialty Chemical Production: Used in the preparation of catalysts, ion-exchange resins, and other high-value specialty chemicals.

Basic Information

Product Name	Chlorosulfonic Acid
CAS No.	7790-94-5
Molecular Formula	ClHO3S or HSO3Cl
Molecular Weight	116.52 g/mol
Synonyms	Chlorosulfuric Acid; Sulfuric Chlorohydrin; Sulfonyl Chloride, Hydroxy-; Monochlorosulfuric Acid; Chlorosulphonic Acid; Sulfuric acid monochloride; HSO3Cl
EINECS	232-234-6

Quality Control

Our Chlorosulfonic Acid is manufactured under stringent process controls to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests including assay, impurity profiling, and physical property determination. A Certificate of Analysis (COA) detailing all specifications and test results is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as water, strong bases, and organic compounds. Due to its highly corrosive and moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere to prevent decomposition and fuming. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Colorless to pale yellow fuming liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0 %
Density (at 20°C)	1.75 - 1.77 g/mL
Iron (Fe)	≤ 10 ppm
Heavy Metals (as Pb)	≤ 5 ppm
Residue on Ignition	≤ 0.01 %

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