21324-39-0
Sodium hexafluorophosphate
CAS: 21324-39-0
Molecular Formula: F6NaP
21324-39-0 - Names and Identifiers
| Name | Sodium hexafluorophosphate |
| Synonyms | Sodium hexafL Sodium hexafluorophosphate SODIUM HEXAFLUOROPHOSPHATE SODIUM HEXAFLUOROPHOSPHATE (V) Sodium hexafluorophosphate anhydrous sodium pentafluoro(hydrido)phosphate(1-) |
| CAS | 21324-39-0 |
| EINECS | 244-333-1 |
| InChI | InChI=1/F6P.Na/c1-7(2,3,4,5)6;/q-1;+1 |
| InChIKey | KMADQUOCJBLXRP-UHFFFAOYSA-N |
21324-39-0 - Physico-chemical Properties
| Molecular Formula | F6NaP |
| Molar Mass | 167.95 |
| Density | 2.369 g/mL at 25 °C (lit.) |
| Melting Point | >200 °C (lit.) |
| Water Solubility | SOLUBLE |
| Solubility | H2O: soluble5%, clear, colorless |
| Appearance | Solid |
| Specific Gravity | 3.375 |
| Color | White to light gray |
| PH | 2.0-4.0 |
| Storage Condition | Room Temprature |
| Stability | Stable. Incompatible with strong acids. |
| Sensitive | Hygroscopic |
| MDL | MFCD00011122 |
| Physical and Chemical Properties | Density 2.369 melting point 200°C water SOLUBLE |
| Use | For the preparation of other hexafluorophosphate |
21324-39-0 - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R34 - Causes burns |
| 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.) |
| UN IDs | UN 3260 8/PG 2 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 3-10 |
| HS Code | 28269090 |
| Hazard Note | Irritant |
| Hazard Class | 6.1 |
| Packing Group | III |
21324-39-0 - Reference Information
| Physical and chemical properties | Sodium hexafluorophosphate is also called "sodium hexafluorophosphate (Ⅴ)". Chemical formula NaPF6 · H2O. Molecular weight 185.97. White powder. It is sensitive to air and carbon dioxide and has 2.36919 relative density. Easily soluble in water. Thermolysis. Preparation method: PCl5 is slowly added dropwise to HF aqueous solution containing NaCl. |
| store | sodium hexafluorophosphate is an inorganic compound that is stable. Incompatible with strong acids. Store in a closed container. Store in a cool, dry, well-ventilated place, away from incompatible substances. Be moisture-proof when stored. |
| Use | Used to make other hexafluorophosphate |
| production method | the reaction needs to be carried out in a fume hood. The reaction was carried out in stainless steel, nickel or copper-nickel alloy containers with a diameter of 3in(1in = 0.0254m) and a height of 7in. Half of the required amount of sodium chloride is placed in the container and the cover is installed. The container is cooled in an ice salt bath and connected to an anhydrous hydrogen fluoride tank. Open the valve and put about 400mL HF liquid into the container. At this time, the height of the liquid surface in the stainless steel container is about 3/4in. Insert a thin wooden strip into the middle pipe, and the part immersed in the liquid will be blackened, thus roughly measuring the height of the liquid surface. To ensure that the sodium chloride is completely dissolved, remove the lid, stir with a stainless steel spoon with a handle, and add 150g (about 0.75mol)PCl5 slowly through the spoon (against the wall of the container) to the solution. Sodium hexafluorophosphate precipitates out immediately, stirring from time to time to make the reaction complete. Because the reaction is quite severe, to take measures to prevent the splash of liquid hydrogen fluoride, the operator must wear thick rubber gloves, preferably behind the protective cover. After all PCl5 is added, remove the lid and put the container into an oil bath. To volatilize the remaining hydrogen fluoride. Dry nitrogen is introduced into the container and heated to about 150°C to remove trace amounts of hydrogen fluoride. The yield of crude product is almost theoretically calculated, with a purity of more than 95%. The impurities are mainly trace iron salts, sometimes a small amount of unreacted fluoride. Dissolve the crude product in methanol (add 60g of product to 100mL of solvent). Add a proper amount of 5% NaOH methanol solution to keep the solution alkaline, check with phenolphthalein, and remove insoluble impurities by centrifugation. The solvent is removed by concentration and crystallized under reduced pressure to obtain monohydrate. It is put into a dryer containing concentrated sulfuric acid and dried to obtain anhydrous salt. The purified product obtained by 0.5mol sodium chloride reaction is 73g, with a yield of 87%. Purification method The crude product weighing about 80g was dissolved in 160mL methanol. A few drops of water and excess ammonia water were added to precipitate the iron impurities, the solution was filtered, evaporated to dryness in a vacuum dryer, the product was dried and dehydrated on H2SO4, the product was about 70g, and the yield was about 86%. This product may contain ammonium fluoride, which can be removed by recrystallization in water. Due to the high solubility of fluorophosphate, there is a lot of loss. Dissolve the salt in water (50g/mL), place the filtered solution in a platinum tray and heat and evaporate on a steam bath until crystals appear in the hot solution, put the mixture into a water bath to cool, filter the crystals with a sintered glass filter, wash with a few milliliters of ice water, filter under reduced pressure until dry, and put it in a dryer with concentrated H2SO4 to dry. The preparation flow chart is as follows: |
Last Update：2024-04-10 22:29:15
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