778990

Sulfuric acid, fuming

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

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

Properties

• 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.)
• 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);
• InChI key: HIFJUMGIHIZEPX-UHFFFAOYSA-N

Description

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.

Caution

may contain particle

Safety Information

• Pictograms: GHS06,GHS05
• Signal Word: Danger
• Hazard Statements: H314,H330,H335
• Precautionary Statements: P260 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 2 Inhalation - Skin Corr. 1A - STOT SE 3
• Target Organs: Respiratory system
• Supplementary Hazards: EUH014
• Storage Class Code: 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