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Merck
CN

778990

Sulfuric acid, fuming

reagent grade, 65.5-68.0% free SO3 basis (with NaOH)

Synonym(s):

Oleum

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About This Item

Linear Formula:
H2SO4 · (SO3)x
CAS Number:
8014-95-7
Molecular Weight:
98.08
UNSPSC Code:
12352106
NACRES:
NA.21
PubChem Substance ID:
329768006
MDL number:
MFCD00137792
Beilstein/REAXYS Number:
2037554

Key Documents

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InChI key

HIFJUMGIHIZEPX-UHFFFAOYSA-N

SMILES string

O=S(=O)=O.OS(O)(=O)=O

InChI

1S/H2O4S.O3S/c1-5(2,3)4;1-4(2)3/h(H2,1,2,3,4);

grade

reagent grade

vapor density

3 (vs air)

vapor pressure

2 mmHg ( 25 °C)

concentration

65.5-68.0% in NaOH (free SO3 )

density

1.925 g/mL at 25 °C (lit.)

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General description

Fuming sulfuric acid is an inorganic acid, produced by the addition of sulfur trioxide to concentrated sulfuric acid. It is commonly used for sulfonation reactions.1 Surface functionalization of poly (propylene) (PP) films using fuming sulfuric acid has been analyzed using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance (ATR) infrared spectroscopy, and chemical modification. It is reported to assist the bromination of methylpyridines in the pyridine nucleus. Fuming sulfuric acid oxidizes fullerene C60 to form fullerene polymers.

Disclaimer

may contain particle

pictograms

Skull and crossbonesCorrosion
GHS06,GHS05

signalword

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Skin Corr. 1A - STOT SE 3

target_organs

Respiratory system

supp_hazards

EUH014

Storage Class

6.1B - Non-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
BCBZ7884
BCBT4508
BCBT0324
BCBT0323
BCBT0322

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Bromination of methylpyridines in fuming sulfuric acid.
Van der Does L and Hertog HJD.
Rec. Trav. Chim., 84(7), 951-964 (1965)
Products of reaction of fullerene C60 with fuming sulfuric acid studied by IR and ESR spectroscopy.
Garkusha OG, et al.
Russian Chemical Bulletin, 51(4), 628-631 (2002)
Sulfonation of poly (propylene) films with fuming sulfuric acid.
Kaneko M and Sato H.
Macromolecular Chemistry and Physics, 206(4), 456-463 (2005)

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