≥98% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature,Argon charged Ships Normal 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 1 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
| Canonical Smiles | C1=CC(=CN=C1)S(=O)(=O)O |
|---|---|
| IUPAC Name | pyridine-3-sulfonic acid |
| InChIKey | DVECLMOWYVDJRM-UHFFFAOYSA-N |
| INCHI | 1S/C5H5NO3S/c7-10(8,9)5-2-1-3-6-4-5/h1-4H,(H,7,8,9) |
| Isomeric SMILES | C1=CC(=CN=C1)S(=O)(=O)O |
| WGK Germany | 3 |
| RTECS | UT7920000 |
| UN Number | 2585 |
| Molecular Weight | 159.16 |
| Beilstein | 120822 |
| Reaxy-Rn | 120822 |
| Reaxys-RN_link_address | https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=120822&ln= |
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 |
|---|---|---|---|
 F2626234 | Certificate of Analysis | Mar 03, 2026 | P106151 |
| F2626235 | Certificate of Analysis | Mar 03, 2026 | P106151 |
| A2214644 | Certificate of Analysis | Oct 13, 2025 | P106151 |
| G2310274 | Certificate of Analysis | Nov 25, 2022 | P106151 |
| G2310285 | Certificate of Analysis | Nov 25, 2022 | P106151 |
| G2310288 | Certificate of Analysis | Nov 25, 2022 | P106151 |
| A2214645 | Certificate of Analysis | Dec 23, 2021 | P106151 |
| A2214646 | Certificate of Analysis | Dec 23, 2021 | P106151 |
| J2222003 | Certificate of Analysis | Dec 23, 2021 | P106151 |
| Solubility | Soluble in methanol. Very slightly soluble in ethanol. Insoluble in ether |
|---|---|
| Sensitivity | Hygroscopic |
| Melt Point(°C) | >300°C |
| 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 | 193.000 |
| 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 |
| 1. Shan-Shan Liu, Zhen Han, Jin-Sen Yang, Sheng-Zheng Huang, Xi-Yan Dong, Shuang-Quan Zang. (2019) Sulfonic Groups Lined along Channels of Metal–Organic Frameworks (MOFs) for Super-Proton Conductor. INORGANIC CHEMISTRY, [PMID:31851507] [10.1021/acs.inorgchem.9b02649] |
