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Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50% Product Code.: 11474863
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Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50%

Product Code. 11474863
50 g
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Product Code. 11474863

Brand: Thermo Scientific Alfa Aesar A12202.18

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Description

CAS: 26412-87-3 | C5H5NO3S | 159.16 g/mol

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.
TRUSTED_SUSTAINABILITY

Chemical Identifiers

CAS 26412-87-3
Molecular Formula C5H5NO3S
Molecular Weight (g/mol) 159.16
MDL Number MFCD00012437
InChI Key UDYFLDICVHJSOY-UHFFFAOYSA-N
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 trioxideShow MoreShow Less
PubChem CID 168533
SMILES O=S(=O)=O.C1=CC=NC=C1

Specifications

Melting Point ∼155°C to 165°C
Quantity 50 g
UN Number UN3261
Beilstein 3704116
Sensitivity Moisture sensitive
Solubility Information Soluble in polar organic solvents.
IUPAC Name pyridine; sulfonylideneoxidane
Formula Weight 159.16
Percent Purity 98%
Chemical Name or Material Sulfur trioxide-pyridine complex, Active SO3 ≈48 to 50%

Certificates

Certificates

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5 results found
Lot Number Certificate Type Date Catalog Number
Lot NumberA0467940 Certificate TypeCertificate of Analysis Date17/05/2025 Catalog NumberA12202.0B,A12202.30,A12202.09,A12202.18
Lot Number10238229 Certificate TypeCertificate of Analysis Date25/10/2023 Catalog NumberA12202.0B,A12202.30,A12202.09,A12202.18
Lot Number10234730 Certificate TypeCertificate of Analysis Date25/10/2023 Catalog NumberA12202.0B,A12202.30,A12202.09,A12202.18
Lot Number10246433 Certificate TypeCertificate of Analysis Date25/04/2023 Catalog NumberA12202.18
Lot Number10245226 Certificate TypeCertificate of Analysis Date05/01/2023 Catalog NumberA12202.0B,A12202.30,A12202.09,A12202.18

Safety and Handling

compliance-icons
Product Identifier
  • Sulfur trioxide-pyridine complex
 Signal Word
  • Warning
 Hazard Category
  • Acute toxicity Category 4
  • Serious eye damage/eye irritation Category 2
  • Skin corrosion/irritation Category 2
 Hazard Statement
  • H302-Harmful if swallowed.
  • H315-Causes skin irritation.
  • H319-Causes serious eye irritation.
 Precautionary Statement
  • P280-Wear protective gloves/protective clothing/eye protection/face protection.
  • P301+P330+P331-IF SWALLOWED: rinse mouth. Do NOT induce vomiting.
  • P302+P352-IF ON SKIN: Wash with plenty of water/soap.
  • P312-Call a POISON CENTER/doctor/if you feel unwell.
  • P337+P313-If eye irritation persists: Get medical advice/attention.
 Supplemental information
  • MIXTURE LIST-Contains : Sulfur trioxide, compound with pyridine
SDS

RUO – Research Use Only

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