pyridine-3-sulfonate
3-Pyridinesulfonic acid
CAS: 636-73-7
Molecular Formula: C5H5NO3S
pyridine-3-sulfonate - Names and Identifiers
| Name | 3-Pyridinesulfonic acid |
| Synonyms | 3-sulfopyridine Pyridinesulfonic aci pyridine-3-sulfonate 3-pyridylsulfonicacid 3-Pyridinesulfonic acid PYRIDINE-3-SULFONIC ACID Pyridine-3-sulphonic acid PYRIDINE-3-SULPHONIC ACID pyridine-3-sulfonic acid Vonoprazan Fumarate impurity O Pyridine-3-sulfonic acid for synthesis |
| CAS | 636-73-7 |
| EINECS | 211-265-9 |
| InChI | InChI=1/C5H5NO3S/c7-10(8,9)5-2-1-3-6-4-5/h1-4H,(H,7,8,9)/p-1 |
| InChIKey | DVECLMOWYVDJRM-UHFFFAOYSA-N |
pyridine-3-sulfonate - Physico-chemical Properties
| Molecular Formula | C5H5NO3S |
| Molar Mass | 159.16 |
| Density | 1.7130 |
| Melting Point | >300 °C (lit.) |
| Water Solubility | soluble |
| Appearance | White crystal |
| Color | White to almost white |
| Maximum wavelength(λmax) | ['262nm(EtOH aq.)(lit.)'] |
| BRN | 120822 |
| pKa | -2.30±0.18(Predicted) |
| Storage Condition | Keep in dark place,Sealed in dry,Room Temperature |
| Sensitive | Light Sensitive |
| Refractive Index | 1.5480 (estimate) |
| MDL | MFCD00006381 |
| Physical and Chemical Properties | White needle-like or plate-like crystals. Melting Point 365-370 °c (338-339 °c, 357 °c). Soluble in water, insoluble in alcohol, ether, benzene and trichloroethylene. |
| Use | For medicine |
pyridine-3-sulfonate - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R34 - Causes burns R22 - Harmful if swallowed |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S27 - Take off immediately all contaminated clothing. |
| UN IDs | UN 2585 8/PG 3 |
| WGK Germany | 3 |
| RTECS | UT7920000 |
| HS Code | 29333999 |
| Hazard Class | 8 |
| Packing Group | III |
pyridine-3-sulfonate - Introduction
Soluble in water, insoluble in methanol, insoluble in ether, benzene and trichloroethane.
Last Update：2022-10-16 17:27:34
pyridine-3-sulfonate - Reference Information
| Use | an intermediate of the drug pyridostigmine. used in medicine organic synthesis, pharmaceutical synthesis intermediates, can be used for the synthesis of drug pyridostigmine/pyridostigmine bromide (anticholinesterase). |
| production method | is obtained from sulfonation of pyridine by fuming sulfuric acid. Fuming sulfuric acid was added to a dry reaction Pan, pyridine was added dropwise under stirring, and the addition was completed for about 2.5H, and then mercury sulfate was added. Heat to 230-240 °c for 13-14H. It is allowed to cool to 20-25 ° C., then it is added to ethanol under cooling, and cooling is continued to below 5 ° C. To precipitate crystals, I .e., pyridine-3-sulfonic acid. |
Last Update：2024-04-09 02:00:10
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