Chlorosulfonic Acid

chlorosulfonic acid

[¦klȯr·ō·səl′fän·ik ′as·əd]
(inorganic chemistry)
ClSO2OH A fuming liquid that decomposes in water to sulfuric acid and hydrochloric acid; used in pharmaceuticals, pesticides, and dyes, and as a chemical intermediate.

Chlorosulfonic Acid


SO2Cl(OH), a monochloroanhydride of sulfuric acid. A colorless, mobile liquid, chlorosulfonic acid has a melting point of – 80°C, a boiling point at atmospheric pressure of 155°C (with decomposition), and a density of 1.75 g/cm3. It is chemically very reactive. It reacts vigorously with water, forming sulfuric and hydrochloric acids, and it fumes in the presence of atmospheric moisture. It also reacts with many organic and inorganic compounds. Chlorosulfonic acid is produced by the reaction of hydrogen chloride with sulfur trioxide: HCl + SO3 = SO2Cl(OH). In the absence of moisture, it can be stored and transported in steel containers. Chlorosulfonic acid is used in the production of dyes, detergents, and drugs; it is also used as a smoke producer.


References in periodicals archive ?
One proposal suggested injecting chlorosulfonic acid, a highly corrosive and toxic substance, into the engine exhaust.
Fifty milliliter of chlorobenzene was charged into a round-bottomflask equipped with a mechanical shaker and connected to a dropping funnel filled with a stoichiometrical amount of chlorosulfonic acid.
During the next few years, the company tested smoke pots, smoke candles, and smoke dispensers filled with sulfur trioxide in chlorosulfonic acid (FS) to establish operational doctrine.
The next big breakthrough came in 2009, when Talmon, Pasquali and colleagues discovered the first true solvent for nanotubes -- chlorosulfonic acid.
The researchers have reported that chlorosulfonic acid can dissolve half-millimeter-long nanotubes in solution, a critical step in spinning fibres from ultralong nanotubes.
Synthesis of the sulfuric acid monoester from epoxidized methyl ester is accomplished by the reaction of epoxidized methyl esters with chlorosulfonic acid in pyridine solution.
It had been hoped to use chlorosulfonic acid for item (f), and sulfur dichloride or monochloride for (g).
The emergency exercise simulated a rail tank car derailment causing the "spill" of chlorosulfonic acid, a raw material used in Rhodia's Baltimore plant.
This stage included the surface modification of sodium montmorillonite nanoparticles by using chlorosulfonic acid, and carrying out the required tests.
The researchers took advantage of novel cryogenic techniques for electron microscopy that allowed them to directly image the graphene sheets in the chlorosulfonic acid.
Pasquali, primary author Nicholas Parra-Vasquez and their colleagues reported this month in the online journal ACS Nano that chlorosulfonic acid can dissolve half-millimeter-long nanotubes in solution, a critical step in spinning fibers from ultralong nanotubes.
3]and its complexes, such as acyl and alkyl sulfates and chlorosulfonic acid, are commonly used as sulfonating agents.