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LC4798 Potassium
(cubes) under protective liquid for synthesis


Order number Packaging Quantity Price €
AC31798 Glass bottle 25 g 36.9
AC31798 Glass bottle 100 g 98.1
AC31798 Glass bottle 250 g 174.6


Product information
Hill Formula K
Chemical formula K
HS Code 2805 19 90
EC number 231-119-8
Molar mass 39.10 g/mol
EC index number 019-001-00-2
CAS number 7440-09-7


Chemical and physical data
Solubility (20 °C) (rigorous decomposition)
Melting point 64 °C
Molar mass 39.10 g/mol
Density 0.856 g/cm3 (20 °C)
Boiling point 760 °C
Vapor pressure 133 hPa (171 °C)



Safety information
R Phrase R 14/15-34
Reacts violently with water, liberating extremely flammable gases.Causes burns.
S Phrase S 5- 8-43-45
Keep contents under paraffin oil.Keep container dry.In case of fire, use sand. Never use water.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).
Categories of danger highly flammable, corrosive
Hazard Symbol


Storage class Materials that form flammble gases in contact with water
WGK WGK 2 water endangering
Disposal 26
Alkali and alkaline-earth metals should be taken up in an inert solvent and neutralized by adding 2-propanol (Cat. No. 100995) dropwise with stirring. Should the reaction be more violent than expected, conversion should be carried out with tert-butanol or octanol. Caution: This reaction produces hydrogen, which can form explosive mixtures; take necessary precautions. When the reaction has ceased, add water dropwise; neutralize; container D. In the case of alkali or alkaline-earth borohydrides, add methanol (Cat. No. 106008) with stirring; in the case of alkali or alkaline-earth amides and hydrides, organoaluminium and organotin hydrides, add 2-propanol (Cat. No. 100995) dropwise. The substances, which are usually in solid form, should be previously suspended in an ether! When the respective reaction has ceased, hydrolize with water; then neutralize. Container D or E. Lithium aluminium hydride must also be destroyed by slurrying in an ether. Under an inert gas and with thorough stirring, add dropwise a 1:4 mixture of ethyl acetate (Cat. No. 822277) and the ether used to prepare the slurry. Always ensure thorough mixing (stirring)! Container A.


Transport information
Declaration (transport by sea) IMDG-Code UN 2257 POTASSIUM, 4.3, I
Declaration (transport by air) IATA-DGR UN 2257 POTASSIUM, 4.3, I



Assay (of K) ≥ 98 %