SODIUM HEXAFLUOROPHOSPHATE

SODIUM HEXAFLUOROPHOSPHATE - 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

SODIUM HEXAFLUOROPHOSPHATE - 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

SODIUM HEXAFLUOROPHOSPHATE - 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

SODIUM HEXAFLUOROPHOSPHATE - 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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