425478

Sulfur trioxide

contains stabilizer, ≥99%

• Sinónimos: Sulfuric anhydride
• Fórmula lineal: SO₃
• Número de CAS: 7446-11-9
• Peso molecular: 80.06
• EC Number: 231-197-3
• MDL number: MFCD00011452
• UNSPSC Code: 12352300
• PubChem Substance ID: 24866637
• NACRES: NA.21

Propiedades

• vapor density: 2.8 (vs air)
• Quality Level: 100
• vapor pressure: 280 mmHg ( 25 °C)
• assay: ≥99%
• contains: stabilizer
• reaction suitability: reagent type: oxidant
• bp: 44.7 °C (lit.)
• mp: 16.8 °C (lit.)
• density: 1.97 g/mL at 25 °C (lit.)
• SMILES string: O=S(=O)=O
• InChI: 1S/O3S/c1-4(2)3
• InChI key: AKEJUJNQAAGONA-UHFFFAOYSA-N

Descripción

General description

Sulfur trioxide (SO₃) is an oxide of sulfur. It is released during the combustion of sulfur bearing fuels. Sulfur dioxide in the presence of vanadia catalyst oxidizes to form sulfur trioxide. The kinetics of this reaction has been studied. Density function theory and ab initio methods have been used to study the hydrolysis of SO₃ to form sulfuric acid.

Application

Sulfur trioxide (SO₃) may be used in the synthesis of methane sulfonic acid (MSA) by sulfonating methane.

Información de seguridad

• pictograms: GHS05,GHS07
• signalword: Danger
• hcodes: H314,H335
• pcodes: P261 - P280 - P305 + P351 + P338 - P310
• Hazard Classifications: Skin Corr. 1A - STOT SE 3
• target_organs: Respiratory system
• supp_hazards: EUH014
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Faceshields, Gloves, Goggles