CAS #:

Linear Formula:


MDL Number:


EC No.:



(1N8) 98% Potassium Fluoride Dihydrate
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(2N) 99% Potassium Fluoride Dihydrate
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(3N) 99.9% Potassium Fluoride Dihydrate
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(4N) 99.99% Potassium Fluoride Dihydrate
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(5N) 99.999% Potassium Fluoride Dihydrate
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Potassium Fluoride Dihydrate Properties (Theoretical)

Compound Formula F4KO2
Molecular Weight 94.127 g/mol
Appearance Monoclinic Crystals
Melting Point 41 °C (105.8 °F)
Boiling Point N/A
Density 2.50 g/cm3
Solubility in H2O Very Soluble in H2O
Exact Mass 93.983239
Monoisotopic Mass 93.983239

Potassium Fluoride Dihydrate Health & Safety Information

Signal Word Danger
Hazard Statements H301-H311-H331
Hazard Codes T
Precautionary Statements P261-P301 + P310-P302 + P352-P304 + P340
Flash Point Not applicable
Risk Codes 23/24/25
Safety Statements 36/37-45
RTECS Number N/A
Transport Information UN 1812 6.1 / PGIII
WGK Germany 1
GHS Pictograms

About Potassium Fluoride Dihydrate

Potassium Fluoride Dihydrate is a water insoluble Potassium source for use in oxygen-sensitive applications, such as metal production. In extremely low concentrations (ppm), fluoride compounds are used in health applications. Fluoride compounds also have significant uses in synthetic organic chemistry. They are commonly also used to alloy metal and for optical deposition. Certain fluoride compounds can be produced at nanoscale and in ultra high purity forms. Potassium Fluoride Dihydrate is generally immediately available in most volumes. Ultra high purity and high purity compositions improve both optical quality and usefulness as scientific standards. Nanoscale elemental powders and suspensions, as alternative high surface area forms, may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Chemical Identifiers

Linear Formula KF•2H2O
MDL Number MFCD00149929
EC No. 232-151-5
Beilstein/Reaxys No. N/A
Pubchem CID 23708904
IUPAC Name potassium fluoride dihydrate
SMILES [K+].[F-].O.O
InchI Identifier InChI=1S/FH.K.2H2O/h1H;;2*1H2/q;+1;;/p-1

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


Fluorine is a Block P, Group 17, Period 2 element. Its electron configuration is [He]2s22p5. The fluorine atom has a covalent radius of 64 pm and its Van der Waals radius is 135 pm. In its elemental form, CAS 7782-41-4, fluorine gas has a pale yellow appearance. Fluorine was discovered by André-Marie Ampère in 1810. It was first isolated by Henri Moissan in 1886.


Elemental PotassiumSee more Potassium products. Potassium (atomic symbol: K, atomic number: 19) is a Block S, Group 1, Period 4 element with an atomic weight of 39.0983. The number of electrons in each of Potassium's shells is [2, 8, 8, 1] and its electron configuration is [Ar] 4s1. The potassium atom has a radius of 227.2 pm and a Van der Waals radius of 275 pm. Potassium was discovered and first isolated by Sir Humphrey Davy in 1807. Potassium is the seventh most abundant element on earth. It is one of the most reactive and electropositive of all metals and rapidly oxidizes. As with other alkali metals, potassium decomposes in water with the evolution of hydrogen because of its reacts violently with water, it only occurs in nature in ionic salts.Potassium Bohr Model In its elemental form, potassium has a silvery gray metallic appearance, but its compounds (such as potassium hydroxide) are more frequently used in industrial and chemical applications. The origin of the element's name comes from the English word 'potash,' meaning pot ashes, and the Arabic word qali, which means alkali. The symbol K originates from the Latin word kalium.


June 28, 2022
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