Chlorosulfonic acid

Chlorosulfonic acid

Chlorosulphonic acid; Sulfuric acid chlorosulfonic ester; Chlorosulfuric acid

CAS 7790-94-5

Chemical Formula ClSO₃H

Molecular Weight 116.52 g/mol

Chlorosulfonic acid is a highly reactive, fuming liquid with a pungent odour. It is primarily used as a sulfonating agent in the production of detergents, dyes, and pharmaceuticals. Due to its strong acidity and reactivity with water, it is handled with extreme care in industrial settings.

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Industrial Uses

1. Pharmaceuticals

  • Intermediate in Drug Synthesis: CSA is used to introduce sulfonic acid groups into molecules, aiding in the synthesis of sulfa drugs and other active pharmaceutical ingredients.
  • Synthesis of Antibiotics & Antihistamines: Plays a role in producing intermediates for certain antibiotics and antihistamine drugs.

2. Performance Chemicals

  • Sulfonation Agent: One of the most powerful sulfonating agents, used in the synthesis of dyes, detergents, agrochemicals, and specialty chemicals.
  • Reagent in Organic Chemistry: CSA is used to introduce both sulfonic acid and chlorosulfonyl groups into aromatic compounds.

3. Agrochemicals

  • Intermediate for Herbicides & Pesticides: CSA is used in the synthesis of active ingredients and intermediates in herbicides and insecticides.
  • Sulfonation of Agrochemical Intermediates: Enhances the water solubility and activity of agrochemicals through sulfonation.

4. Polymers & Resins

  • Modification of Polymers: CSA is used to sulfonate polymers like polystyrene to enhance ionic conductivity (e.g., in fuel cell membranes).
  • Resin Curing: Acts as a catalyst or modifier in certain resin curing processes.

Specifications

Assay ≥ 99% (typically industrial grade)
Appearance Colorless to pale yellow fuming liquid
Odor Pungent, suffocating, similar to hydrochloric acid
Boiling Point 152 °C (decomposes)
Melting Point −80 °C
Density 1.75 g/cm³ at 20 °C
Solubility Reacts violently with water and alcohols (hydrolyzes)
Viscosity ~12.8 mPa·s at 25 °C
Flash Point Not flammable but highly reactive with water

Hazard Symbols

Corrosives
Acute Toxicity
Irritants/Sensitisers/Other Hazards
Environmental Hazard

FAQs

1. What is the current price of Chlorosulfonic acid in India?
The price Chlorosulfonic acid can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.6301 00 6301 directly for a customized quote tailored to your needs.

2. Where can I buy Chlorosulfonic acid in India?
You can purchase Chlorosulfonic acid from MULTICHEM, a leading exporter with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across global markets. For more details on how to place an order, please visit our website or contact our sales team.
 

3. What is the minimum order quantity (MOQ) for Chlorosulfonic acid?
Our minimum order quantity (MOQ) Chlorosulfonic acid is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Chlorosulfonic acid supplied by Multichem?                      
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.