Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50%, Thermo Scientific Chemicals

Product Code	Brand	Quantity
11423960	Thermo Scientific Alfa Aesar A12202.09	10 g
11474863	Thermo Scientific Alfa Aesar A12202.18	50 g
11484863	Thermo Scientific Alfa Aesar A12202.30	250 g
11464863	Thermo Scientific Alfa Aesar A12202.0B	1000 g

Description

Sulfur trioxide-pyridine complex is used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with dimethyl sulfoxide. It is also used as a source of sulfur trioxide especially in the preparation of sulfate esters. Further, it is used as an activating electrophile in a Parikh-Doering oxidation. In addition to this, it is also used in the preparation and anticoagulation test of sulfated silk fibroin.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Sulfur trioxide-pyridine complex is used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with dimethyl sulfoxide. It is also used as a source of sulfur trioxide especially in the preparation of sulfate esters. Further, it is used as an activating electrophile in a Parikh-Doering oxidation. In addition to this, it is also used in the preparation and anticoagulation test of sulfated silk fibroin.

Solubility
Soluble in polar organic solvents.

Notes
Moisture sensitive. Incompatible with strong oxidizing agents.

Chemical Identifiers

• CAS: 26412-87-3
• Molecular Weight (g/mol): 159.16
• InChI Key: UDYFLDICVHJSOY-UHFFFAOYSA-N
• PubChem CID: 168533

• Molecular Formula: C5H5NO3S
• MDL Number: MFCD00012437
• Synonym: pyridine sulfur trioxide, sulfur trioxide pyridine complex, pyridine; sulfur trioxide, pyridine sulfotrioxide, pyridine compound with sulfur trioxide 1:1, sulfur trioxide, compd. with pyridine, pyridine-sulfur trioxide complex, active sulfure trioxide, sulfur trioxide-pyridine, pyridine-sulfur trioxide
• SMILES: O=S(=O)=O.C1=CC=NC=C1

Specifications

• CAS: 26412-87-3
• Molecular Formula: C5H5NO3S
• UN Number: UN3261
• Sensitivity: Moisture sensitive
• Solubility Information: Soluble in polar organic solvents.
• SMILES: O=S(=O)=O.C1=CC=NC=C1
• Molecular Weight (g/mol): 159.16
• Formula Weight: 159.16
• Chemical Name or Material: Sulfur trioxide-pyridine complex, Active SO₃ ≈48 to 50%

• Melting Point: ∼155°C to 165°C
• MDL Number: MFCD00012437
• Beilstein: 3704116
• Synonym: pyridine sulfur trioxide, sulfur trioxide pyridine complex, pyridine; sulfur trioxide, pyridine sulfotrioxide, pyridine compound with sulfur trioxide 1:1, sulfur trioxide, compd. with pyridine, pyridine-sulfur trioxide complex, active sulfure trioxide, sulfur trioxide-pyridine, pyridine-sulfur trioxide
• InChI Key: UDYFLDICVHJSOY-UHFFFAOYSA-N
• IUPAC Name: pyridine;sulfur trioxide
• PubChem CID: 168533
• Percent Purity: 98%

Safety and Handling

GHS H Statement
H314-H318-H302
Causes severe skin burns and eye damage.
Causes serious eye damage.
Harmful if swallowed.

P264b-P270-P280-P301+P312-P302+P352-P305+P351+P338-P330-P332+P313-P362-P501c

H302-H315-H319

missing translation for 'dotInformation' : Transport Hazard Class: 8; Packing Group: II; Proper Shipping Name: CORROSIVE SOLID, ACIDIC, ORGANIC, N.O.S.

missing translation for 'einecsNumber' : 247-683-3

missing translation for 'tsca' : Yes

Recommended Storage : Ambient temperatures; Store under Nitrogen

RUO – Research Use Only