C5H5NO3S
159.17 g/mol
Research ReagentDanger
Sulfur trioxide-pyridine
CAS26412-87-3EC247-683-3
Category
Research Reagent
Compound Class
Heterocycle
Primary Use
Research Compound
Sulfur trioxide-pyridine is a chemical compound used as a reagent in sulfonation and sulfation reactions. It is a salt-like or mixture-like compound formed from sulfur trioxide and pyridine.
sulfonation reagentsulfation reagent
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
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Safety Reference
Danger
H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H319Causes serious eye irritation
Customs Tariff Classification
The international HS code for Sulfur trioxide-pyridine (CAS 26412-87-3) is 2942.00.
HS code (international, 6-digit)
2942.00
EU CN code (8-digit)
2942 00 00
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
pyridine;sulfur trioxide
InChIKey
UDYFLDICVHJSOY-UHFFFAOYSA-N
SMILES
C1=CC=NC=C1.O=S(=O)=O
Synonyms (11)
- Py.SO3
- Pyridine sulfotrioxide
- Pyridine sulfur trioxide
- SO3.Pyridine
- Sulphur trioxide pyridine
- pyridine sulphur trioxide
- sulfur trioxide-pyridine
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