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Key Documents

8.18112

Sigma-Aldrich

Sulfur trioxide pyridine complex

for synthesis

Synonym(s):

Sulfur trioxide pyridine complex

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About This Item

Empirical Formula (Hill Notation):
C5H5N · O3S
CAS Number:
26412-87-3
Molecular Weight:
159.16
MDL number:
MFCD00012437
UNSPSC Code:
12352303
EC Index Number:
247-683-3
NACRES:
NA.22

Quality Level

200

assay

≥97.0% (acidimetric)

autoignition temp.

>350 °C

potency

500-2000 mg/kg LD50, oral (Rat)

reaction suitability

reagent type: oxidant

mp

155-165 °C

bulk density

600 kg/m3

storage temp.

2-30°C

InChI

1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;

InChI key

UDYFLDICVHJSOY-UHFFFAOYSA-N

Application


  • Post-synthetic modulation of the charge distribution in a metal–organic framework for optimal binding of carbon dioxide and sulfur dioxide: This study discusses the modulation of pore environment to optimize the binding of sulfur dioxide in metal-organic frameworks. (L Li et al., 2019).

  • Sulfation of abies ethanol lignin by complexes of sulfur trioxide with 1, 4-dioxane and pyridine: Research on the sulfation of lignin using a complex of sulfur trioxide with pyridine, exploring its implications and efficiency. (YN Malyar et al., 2021).

  • Antioxidant and anticoagulant activities of mycelia polysaccharides from Catathelasma ventricosum after sulfated modification: This article explores the use of sulfur trioxide–pyridine complex for sulfating polysaccharides, enhancing their biological activities. (Y Liu et al., 2018).

  • Sulfation of citrus pectin by pyridine-sulfurtrioxide complex and its anticoagulant activity: Study on derivatizing citrus pectin using a pyridine-sulfur trioxide complex to explore its potential health benefits. (Y Hu et al., 2015).

  • Sulfur Dioxide–Pyridine Dimer. FTIR and Theoretical Evidence for a Low-Symmetry Structure: An investigation into the structure of the sulfur dioxide–pyridine complex using FTIR spectroscopy and theoretical models. (JW Keller, 2015).

Analysis Note

Assay (acidimetric): ≥ 97.0 %
Melting range (lower value): ≥ 160 °C
Melting range (upper value): ≤ 170 °C

pictograms

Exclamation mark
GHS07

signalword

Warning

Hazard Classifications

Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 3

Certificates of Analysis (COA)

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