Determine the necessary mass, volume, or concentration for preparing a solution.
≥97% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.
Room temperature,Argon charged,Cool 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 16 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.
Usually used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with DMSO.
| Pubchem Sid | 504757622 |
|---|---|
| Pubchem Sid Url | https://pubchem.ncbi.nlm.nih.gov/substance/504757622 |
| Canonical Smiles | C1=CC=NC=C1.O=S(=O)=O |
| IUPAC Name | pyridine;sulfur trioxide |
| InChIKey | UDYFLDICVHJSOY-UHFFFAOYSA-N |
| INCHI | 1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H; |
| Isomeric SMILES | C1=CC=NC=C1.O=S(=O)=O |
| WGK Germany | 3 |
| PubChem CID | 168533 |
| UN Number | 3261 |
| Molecular Weight | 159.16 |
| Beilstein | 3704116 |
| Reaxy-Rn | 3704116 |
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 | Organoheterocyclic compounds |
| Class | Pyridines and derivatives |
| Subclass | Not available |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Pyridines and derivatives |
| Alternative Parents | Heteroaromatic compounds Azacyclic compounds Organopnictogen compounds Organonitrogen compounds Organic oxides Hydrocarbon derivatives |
| Molecular Framework | Aromatic heteromonocyclic compounds |
| Substituents | Pyridine - Heteroaromatic compound - Azacycle - Organic nitrogen compound - Organic oxygen compound - Organopnictogen compound - Organic oxide - Hydrocarbon derivative - Organonitrogen compound - Aromatic heteromonocyclic compound |
| Description | This compound belongs to the class of organic compounds known as pyridines and derivatives. These are compounds containing a pyridine ring, which is a six-member aromatic heterocycle which consists of one nitrogen atom and five carbon atoms. |
| 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 |
|---|---|---|---|
| Certificate of Analysis | May 15, 2026 | S106808 | |
| Certificate of Analysis | May 15, 2026 | S106808 | |
| Certificate of Analysis | May 15, 2026 | S106808 | |
| Certificate of Analysis | May 15, 2026 | S106808 | |
| Certificate of Analysis | Oct 30, 2025 | S106808 | |
| Certificate of Analysis | May 12, 2025 | S106808 | |
| Certificate of Analysis | May 12, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Jan 03, 2025 | S106808 | |
| Certificate of Analysis | Oct 18, 2024 | S106808 | |
| Certificate of Analysis | Jun 20, 2024 | S106808 | |
| Certificate of Analysis | Jun 20, 2024 | S106808 | |
| Certificate of Analysis | Sep 07, 2023 | S106808 | |
| Certificate of Analysis | Feb 08, 2023 | S106808 | |
| Certificate of Analysis | Jan 19, 2023 | S106808 | |
| Certificate of Analysis | Sep 20, 2022 | S106808 | |
| Certificate of Analysis | Dec 16, 2021 | S106808 | |
| Certificate of Analysis | Dec 16, 2021 | S106808 | |
| Certificate of Analysis | Dec 16, 2021 | S106808 | |
| Certificate of Analysis | Mar 01, 2021 | S106808 |
| Solubility | Soluble in polar organic solvents. |
|---|---|
| Sensitivity | Moisture sensitive. |
| Melt Point(°C) | 160°C |
| Molecular Weight | 159.170 g/mol |
| XLogP3 | |
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 0 |
| Exact Mass | 158.999 Da |
| Monoisotopic Mass | 158.999 Da |
| Topological Polar Surface Area | 65.099 Ų |
| Heavy Atom Count | 10 |
| Formal Charge | 0 |
| Complexity | 92.800 |
| 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 | 2 |
| 1. Xiaojing Sun, Hang Li, Liujie Qi, Fei Wang, Yachen Hou, Jingan Li, Shaokang Guan. (2023) Construction and biocompatibility evaluation of MOF/S-HA composite coating on the surface of magnesium alloy vascular stent. PROGRESS IN ORGANIC COATINGS, [PMID:] [10.1016/j.porgcoat.2023.108177] |
| 2. Xue-Wu Chen, Yu-Yun Zheng, Jian-Ming Ouyang. (2023) Sulfated Undaria pinnatifida Polysaccharide Promotes Endocytosis of Nano-Calcium Oxalate Dihydrate by Repairing Subcellular Organelles in HK-2 Cells. Antioxidants, 12 (5): (1015). [PMID:37237881] [10.3390/antiox12051015] |
| 3. Fei Fan, Ping Zhang, Lihao Wang, Tiantian Sun, Chao Cai, Guangli Yu. (2019) Synthesis and Properties of Functional Glycomimetics through Click Grafting of Fucose onto Chondroitin Sulfates. BIOMACROMOLECULES, [PMID:31361469] [10.1021/acs.biomac.9b00878] |
| 4. Ling Li, Jin Zhang, Chao Li, Liqiang Chen, Renzhong Qiao. (2014) A facile method for synthesizing water-soluble and superior sustained release anti-HIV prodrug SCs–d4T. Materials Science & Engineering C-Materials for Biological Applications, [PMID:25686930] [10.1016/j.msec.2014.12.065] |
| 5. Songbai Liu, Yuanqing Fu, Si Nian. (2014) Buffering colour fluctuation of purple sweet potato anthocyanins to acidity variation by surfactants. FOOD CHEMISTRY, [PMID:24874351] [10.1016/j.foodchem.2014.04.029] |
| 6. Ling-Ling Shao, Quan-Fu An, Yan-Li Ji, Qiang Zhao, Xue-San Wang, Bao-Ku Zhu, Cong-Jie Gao. (2014) Preparation and characterization of sulfated carboxymethyl cellulose nanofiltration membranes with improved water permeability. DESALINATION, [PMID:] [10.1016/j.desal.2014.01.025] |
| 7. Sheng Yan, Yunren Qiu. (2024) Interfacial Interaction between Functionalization of Polysulfone Membrane Materials and Protein Adsorption. Polymers, 16 (12): (1637). [PMID:38931987] [10.3390/polym16121637] |
| 8. Xue-Wu Chen, Liu-Qing Gu, Xin-Yu Zeng, Xin-Yuan Sun, Jian-Ming Ouyang. (2024) Sulfated Pelvetia siliquosa Polysaccharides Inhibit CaOx Stone Formation by Inhibiting Calcium Oxalate Crystallization, Cellular Inflammation, and Crystal Adhesion. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, [PMID:39741421] [10.1021/acs.jafc.4c07044] |
| 9. Xue-Wu Chen, Jun Long, Quan Zhang, Linghong Huang, Xin-Yuan Sun. (2025) Sulfated Undaria pinnatifida polysaccharides inhibit kidney stone formation through crystalline modulation and relieving cellular oxidative damage and inflammation. Biomaterials Science, [PMID:39928054] [10.1039/D4BM01362J] |
| 10. Bing-Jie Chen, Yong-Jin Qiao, Gang Yu, Xiao Wang, Yi Zhang, Ling-Lin Fu. (2024) Sulfation, characterization, antibacterial activity, and action mechanism of rice bran polysaccharides. Food Bioscience, [PMID:] [10.1016/j.fbio.2024.103953] |
| 11. Shuqin Xu, Meiling Qiu, Liyuan Liang, Yue Chen, Yajia Wang, Jing Wu, Jinghua Chen. (2025) Multifunctions of Sustainable Chondroitin Sulfates with Predominant Subtypes and Low Molecular Weights on Neurite Outgrowth. BIOMACROMOLECULES, [PMID:39835408] [10.1021/acs.biomac.4c01713] |
| 12. Ning Yu, Rui Fang, Zhao Ding, Xi Xu, Jianfa Zhang. (2024) Preparation and structural characterization of a sulfated octasaccharide with heparin-like anticoagulant activity. CARBOHYDRATE POLYMERS, [PMID:39487001] [10.1016/j.carbpol.2024.122782] |
| 13. Shuqin Xu, Xiaoli Tang, Maosen Wang, Zhuqun Wang, Rui Zhan, Jinghua Chen. (2025) Stimuli-responsive hydrogels composed of modified cellulose nanocrystal and gelatin with oriented channels for guiding axonal myelination. CARBOHYDRATE POLYMERS, [PMID:40049973] [10.1016/j.carbpol.2025.123402] |
| 14. Li Zhenwei, Yan Mi, Su Xu, Lei Wenyang, Han Jinming, Huang Qiushi, Liao Hongxin, Hu Xuebu. (2025) A multifunctional polyelectrolyte binder to improve fast charging capability of graphite anode in lithium-ion batteries. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 36 (17): (1-11). [PMID:] [10.1007/s10854-025-15054-w] |
| 15. Jing Yang, Zhu Liang, Hui Zhao, Jingping Huang, Ying Song, Jingyu Zhu, Yishu Yan, Yuntao Zhu. (2025) Nanoparticle-mediated liver targeted delivery of IFN-γ confers enhanced anti-fibrotic efficacy with reduced systemic toxicity. INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, [PMID:41093218] [10.1016/j.ijbiomac.2025.148277] |
| 16. Liu-Jie Qi, Zhao-Qi Zhang, Zhong-Na Zhang, Jing-An Li, Shao-Kang Guan. (2026) Theoretical calculation-experimental collaborative design of integrated coating for degradation regulation and diagnosis-treatment of magnesium alloy for cerebrovascular stents. Journal of Advanced Research, [PMID:41713732] [10.1016/j.jare.2026.02.028] |