| Pyridine sulfur trioxide Basic information |
| Product Name: | Pyridine sulfur trioxide |
| Synonyms: | Pyridine,compd.withsulfurtrioxide(1:1);PYRIDINE SULFUR TRIOXIDE COMPLEX ( PSS );Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50% w/w;sulphur trioxide–pyridine (1:1);Sulfur trioxide-pyridine complex, tech., 80%;Sulfurtrioxide-pyridinecomplex,98%;Sulfur trioxide pyridine complex, tech. (48.8-50.3% active SO3);Pyridine, compd. with sulfur trioxide |
| CAS: | 26412-87-3 |
| MF: | C5H5NO3S |
| MW: | 159.16 |
| EINECS: | 247-683-3 |
| Product Categories: | Heterocycle-Pyridine series;Pyridines;Oxidation;Sulfur Compounds (for Synthesis);Synthetic Organic Chemistry |
| Mol File: | 26412-87-3.mol |
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| Pyridine sulfur trioxide Chemical Properties |
| Melting point | ~160 °C |
| storage temp. | Store below +30°C. |
| solubility | Soluble in polar organic solvents. |
| form | Powder |
| color | White to beige |
| Water Solubility | reacts |
| Sensitive | Moisture Sensitive |
| BRN | 3704116 |
| InChI | InChI=1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H; |
| InChIKey | UDYFLDICVHJSOY-UHFFFAOYSA-N |
| SMILES | C1=CC=NC=C1.S(=O)(=O)=O |
| CAS DataBase Reference | 26412-87-3(CAS DataBase Reference) |
| EPA Substance Registry System | Pyridine sulfur trioxide (26412-87-3) |
| Safety Information |
| Hazard Codes | C |
| Risk Statements | 22-34 |
| Safety Statements | 26-36/37/39-45 |
| RIDADR | UN 3261 8/PG 2 |
| WGK Germany | 3 |
| F | 3-10-21 |
| Autoignition Temperature | >350 °C |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | II |
| HS Code | 29420000 |
| Toxicity | LD50 orally in Rabbit: 500 – 2000 mg/kg |
| Provider | Language |
|---|---|
| Pyridine sulfur trioxide | English |
| SigmaAldrich | English |
| ACROS | English |
| ALFA | English |
| Pyridine sulfur trioxide Usage And Synthesis |
| Chemical Properties | white solid |
| Uses | Usually used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with DMSO. |
| Uses | Pyridine-Sulfur Trioxide Complex is used in the sulfation of squid ink polysaccharides (SIPs) as a potential candidate compound for the prevention of tumor metastasis. Pyridine-Sulfur Trioxide Complex is also used in the preparation and anticoagulation test of sulfated silk fibroin. |
| Uses | 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. |
| Purification Methods | Wash the solid with a little CCl4, then H2O to remove traces of pyridine sulfate, and dry it over P2O5. [Baumgarten Chem Ber 59 1166 1926, Olah et al. Synthesis 59 1979, Beilstein 20/5 V 184]. |
| Pyridine sulfur trioxide Preparation Products And Raw materials |