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Merck
CN

05-4020

Chlorosulfonic acid

CP

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About This Item

Linear Formula:
ClSO3H
CAS Number:
7790-94-5
Molecular Weight:
116.52
UNSPSC Code:
12352100
PubChem Substance ID:
329748059
MDL number:
MFCD00011523

Key Documents

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InChI

1S/ClHO3S/c1-5(2,3)4/h(H,2,3,4)

SMILES string

OS(Cl)(=O)=O

InChI key

XTHPWXDJESJLNJ-UHFFFAOYSA-N

grade

CP

vapor density

4 (vs air)

vapor pressure

1 mmHg ( 25 °C), 3.3 mmHg ( 37.7 °C)

form

liquid

expl. lim.

37.7 %

availability

available only in Japan

refractive index

n20/D 1.433 (lit.)

pKa 

-6

bp

151-152 °C/755 mmHg (lit.)

density

1.753 g/mL at 25 °C (lit.)

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Related Categories

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 1 Inhalation - Eye Dam. 1 - Skin Corr. 1A - STOT SE 3

target_organs

Respiratory system

supp_hazards

EUH014

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Information

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Certificates of Analysis (COA)

Lot/Batch Number
A1474
A0948
A0742

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José Barluenga et al.
Journal of the American Chemical Society, 131(11), 4031-4041 (2009-02-28)
A detailed study of the scope of a new Pd-catalyzed synthesis of indoles from 1,2-dihaloarenes and o-halobenzene sulfonates and imines is described. The cascade reaction comprises an imine alpha-arylation followed by an intramolecular C-N bond-forming reaction promoted by the same
Yasushi Tamada
Biomaterials, 25(3), 377-383 (2003-10-31)
Silk fibroin (Bombyx mori) was sulfated using chlorosulfonic acid in pyridine. FT-IR spectra showed introduction of sulfate group by this reaction; NMR spectra indicated that sulfation occurred mainly at tyrosine and serine residues. Molecular size decreased and dispersed with sulfation.
Guido Sonsmann et al.
Journal of the American Society for Mass Spectrometry, 13(1), 47-58 (2002-01-05)
The fragmentation of the multiply charged peptides b-chain of bovine insulin and glucagon have been investigated under low energy collision induced dissociation (CID) conditions using an electrospray ion trap mass spectrometer. The influence of charge state, specific amino acids such
Yongzhen Tao et al.
Carbohydrate research, 341(13), 2261-2269 (2006-06-30)
A water-soluble hyperbranched beta-glucan, coded as TM3b, extracted from sclerotia of an edible fungus (Pleurotus tuber-regium) was fractioned into eight fractions coded as F1-F8 by a nonsolvent addition method. Five fractions were treated with chlorosulfonic acid at 35 degrees C
P Taddei et al.
Biomacromolecules, 8(4), 1200-1208 (2007-03-07)
Silk fabrics were treated with chlorosulphonic acid in pyridine for different times. The amount of sulfur bound to silk increased during the first 2 h of reaction and then reached a plateau. The amino acidic pattern of sulfated silk remained
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