The sulfonation is carried out in the presence of well-known reagents such as sulfuric acid , trimethylsilyl chlorosulfate , and chlorosulfonic acid
Acid spun CNT electrodes were dissolved in chlorosulfonic acid
without the use of sonication, surfactants, or polymer coatings that would serve as impurities.
Mokhtary, "Polyvinylpolypyrrolidone-supported chlorosulfonic acid
: an efficient catalyst for one-pot synthesis of dihydropyrimidinones and octahydroquinazolin-2,5-diones," Polycyclic Aromatic Compounds, vol.
One proposal suggested injecting chlorosulfonic acid
, a highly corrosive and toxic substance, into the engine exhaust.
 found that acid catalysis was a process of autocatalysis when using chlorosulfonic acid
as an enolizing agent.
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 chemicals purchased from Sigma-Aldrich, Fluka, or Merck companies include anhydrous methanol (>99.8%), 1-methylimidazole (>99%), sulfuric acid (97%), imidazole (>99.8%), chlorosulfonic acid
(99.0%), dichloromethane (>99.8%), n-hexane (>99%), KOH (analytical grades), ethyl acetate, and diethyl ether.
The next big breakthrough came in 2009, when Talmon, Pasquali and colleagues discovered the first true solvent for nanotubes -- chlorosulfonic acid
. For the first time, scientists had a way to create highly concentrated solutions of nanotubes, a development that led to improved alignment and packing.
The researchers have reported that chlorosulfonic acid
can dissolve half-millimeter-long nanotubes in solution, a critical step in spinning fibres from ultralong nanotubes.
(2.32 mL, 0.02 mol) was added drop wise into the mixture of compound 5 (3.36 g, 0.01 mol) and catalytic amount of [P.sub.2] [O.sub.5] over 30 minutes with constant stirring at 0-5[degrees]C.
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.
LC-MS analysis was performed in the negative ion mode, with selected ion monitoring of the pseudomolecular ions at m/z 125 for ETS ([M.sub.r] 126.1) and m/z 130 for ETS-[D.sub.5] (pentadeuterated internal standard, prepared by reaction of ethanol-[D.sub.6] with chlorosulfonic acid
; Sigma-Aldrich) and at m/z 221 and m/z 226 for EtG ([M.sub.r] 222.1) and EtG-[D.sub.5] (internal standard; Medichem Diagnostics), respectively.