Hydrogen fluoride-pyridine solution
Hydrogen fluoride-pyridine
CAS: 32001-55-1;62778-11-4
Molecular Formula: C5H5N.HF
Hydrogen fluoride-pyridine solution - Names and Identifiers
| Name | Hydrogen fluoride-pyridine |
| Synonyms | Olahs Pyridine, hydrofluoride Hydrogen fluoridehyridine Hydrogen fluoride-pyridine Hydrogen fluoride pyridine complex Pyridinium poly(hydrogen fluoride) Hydrogen fluoride-pyridine solution |
| CAS | 32001-55-1 62778-11-4 |
| EINECS | 250-889-6 |
| InChI | InChI=1/C5H5N.HI/c1-2-4-6-5-3-1;/h1-5H;1H |
Hydrogen fluoride-pyridine solution - Physico-chemical Properties
| Molecular Formula | C5H5N.HF |
| Molar Mass | 99.11 |
| Density | 1.1 g/mL at 20 °C(lit.) |
| Boling Point | 115.3°C at 760 mmHg |
| Flash Point | 20°C |
| Vapor Presure | 22.8mmHg at 25°C |
| Appearance | Form Liquid, color Clear pale yellow to light brown |
| Storage Condition | Room Temprature |
| Sensitive | Easily absorbing moisture |
| MDL | MFCD00012436 |
| Physical and Chemical Properties | Appearance colorless to light yellow transparent liquid boiling point 50 ℃/1mmHg |
| Use | Fluorinated reagent |
Hydrogen fluoride-pyridine solution - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | R34 - Causes burns |
| Safety Description | S29 - Do not empty into drains. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S7/9 - Keep container tightly closed and in a well-vent |
| UN IDs | UN 1790 8/PG 1 |
| WGK Germany | 2 |
| FLUKA BRAND F CODES | 3-10 |
| TSCA | T |
| HS Code | 29333999 |
| Hazard Class | 8 |
| Packing Group | II |
Hydrogen fluoride-pyridine solution - Upstream Downstream Industry
| Downstream Products | 2-CHLORO-5-FLUOROPYRIDINE-6-CARBOXYLIC ACID ORNOPROSTIL 7-FLUORO-1-TETRALONE |
Hydrogen fluoride-pyridine solution - Nature
| sensitivity | Moisture Sensitive |
| BRN | 4750151 |
Last Update：2024-04-10 22:29:15
Hydrogen fluoride-pyridine solution - Uses and synthesis methods
application
In the manufacturing process of organic fluorine chemicals, some fluorine-containing acyl fluoride compounds are often produced as intermediates in the process, such as hydropyridine fluoride. It can be used as an intermediate in laboratory research and development processes and chemical and pharmaceutical synthesis processes.
Preparation
Hydropyridine fluoride is prepared as follows:
1) In a reaction kettle with a stirrer, add 32kg of methanol, and slowly add 79kg of pyridine under stirring to mix the two evenly to obtain a mixture of methanol and pyridine;
2) Transfer the mixture of methanol and pyridine obtained above to a closed reactor with a stirrer. At room temperature of 0 ℃, start stirring, slowly add 400kg of perfluorooctyl fluoride to the mixture of methanol and pyridine by dropping, and continue stirring for 2 hours after adding;
3) transfer the reaction products obtained above to a tower kettle of a rectification tower with a theoretical plate number of 60, and carry out rectification to obtain 395kg of perfluorooctanoate methyl ester (about 96% yield). in addition, 115kg of mixture is recovered from the tower kettle, which is mainly pyridine fluoride, a complex of pyridine and hydrogen fluoride, and can be directly used for fluorination reaction without other treatment.
Last Update：2024-04-10 22:29:15
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