CAS Number: 7790-94-5
Formula: HClO3S
Formula Weight: 116.52
Linear Formula: ClSO3H
MDL No.: MFCD00011523
Purity: 0.99
Boiling Point: 151-152 C/755 mmHg(lit.)
Density: 1.753 g/mL at 25 C(lit.)
Refractive Index: n20/D 1.433(lit.)
EC Number: 232-234-6
UNSPSC Code: 12352100
General description: Chlorosulfonic acid is a strong acid that is synthesized on an industrial scale by reacting sulfur trioxide and dry hydrogen chloride gas in an equimolar ratio. It can act as a sulfonating, dehydrating, oxidizing and chlorinating agent. It is reported to be a better electrophilic olefin cyclization agent in comparison to other sulfonic acids. Its infrared spectra in the solid, liquid and gaseous state have been recorded in the region 4000-400cm-1.
Application: Chlorosulfonic acid may be used in the following processes: . Synthesis of di-n-butyl ammonium chlorosulfonate, a secondary amine ionic liquid.. To prepare sulfonated polyethersulfone (SPES) with enhanced hydrophilic property.. To attach sulfate group to silk fibroin for improving its anticoagulant ability.. As a catalyst to prepare substituted coumarin, via von Pechmann condensation between phenol and β-ketoester.. As a substitute to acid catalyst in Biginelli reaction to prepare 3,4dihydropyrimidines.
RTECS: FX5730000
RIDADR: UN 1754 8 / PGI
WGK Germany: 1
R Codes: 14-35-37
S Codes: 26-45
IOD Codes: C
Symbol: GHS05, GHS07
Signal Word: Danger
Hazard Statements: H314-H335
Precautionary statements: P260-P280-P303 + P361 + P353-P304 + P340 + P310-P305 + P351 + P338