≥95% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Store at 2-8°C Ships Wet ice Check lot-specific COA for exact specifications.
SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.
Cited in 0 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
| Canonical Smiles | C1=CN=CC=C1S(=O)(=O)O |
|---|---|
| IUPAC Name | pyridine-4-sulfonic acid |
| InChIKey | PTWLOSARXIJRRJ-UHFFFAOYSA-N |
| INCHI | 1S/C5H5NO3S/c7-10(8,9)5-1-3-6-4-2-5/h1-4H,(H,7,8,9) |
| Isomeric SMILES | C1=CN=CC=C1S(=O)(=O)O |
| PubChem CID | 221127 |
| UN Number | 1759 |
| Packing Group | III |
| Molecular Weight | 159.17 |
Comprehensive hazard, handling, storage, and regulatory compliance document.
Download SDS →Lot-specific quality data. Enter your lot number to retrieve the exact COA.
Look up COA →Full quality attributes and acceptance criteria for this grade.
View spec sheet →Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Organic acids and derivatives |
| Class | Organic sulfonic acids and derivatives |
| Subclass | Organosulfonic acids and derivatives |
| Intermediate Tree Nodes | Arylsulfonic acids and derivatives - Arylsufonic acids |
| Direct Parent | 1-sulfo,2-unsubstituted aromatic compounds |
| Alternative Parents | Pyridines and derivatives Sulfonyls Organosulfonic acids Heteroaromatic compounds Azacyclic compounds Organopnictogen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aromatic heteromonocyclic compounds |
| Substituents | 1-sulfo,2-unsubstituted aromatic compound - Pyridine - Heteroaromatic compound - Sulfonyl - Organosulfonic acid - Azacycle - Organoheterocyclic compound - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organosulfur compound - Organonitrogen compound - Aromatic heteromonocyclic compound |
| Description | This compound belongs to the class of organic compounds known as 1-sulfo,2-unsubstituted aromatic compounds. These are an arylsulfonic acid carrying the sulfonic acid group at the 1-position, and no substitute at the 2-position of the aromatic ring. |
| External Descriptors | Not available |
Find and download the COA for your product by matching the lot number on the packaging.
| Lot Number | Certificate Type | Date | Item |
|---|---|---|---|
 G2430501 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| G2430502 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| G2430503 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| G2430504 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| G2430508 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| G2430541 | Certificate of Analysis | Jul 23, 2024 | P351421 |
| Melt Point(°C) | 330° C (dec.) |
|---|---|
| Molecular Weight | 159.170 g/mol |
| XLogP3 | -0.400 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 1 |
| Exact Mass | 158.999 Da |
| Monoisotopic Mass | 158.999 Da |
| Topological Polar Surface Area | 75.600 Ų |
| Heavy Atom Count | 10 |
| Formal Charge | 0 |
| Complexity | 187.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 0 |
| Covalently-Bonded Unit Count | 1 |
