Potassium formate

from Wikipedia, the free encyclopedia
Structural formula
Structural formula of potassium formate
Surname Potassium formate
Molecular formula CHKO 2
Brief description

white solid

External identifiers / databases
CAS number 590-29-4
EC number 209-677-9
ECHA InfoCard 100.008.799
PubChem 2735122
ChemSpider 11054
Wikidata Q418356
Molar mass 84.12 g mol −1
Physical state



1.91 g cm −3

Melting point

165-168 ° C


very easy in water

safety instructions
GHS labeling of hazardous substances
no GHS pictograms
H and P phrases H: no H-phrases
P: no P-phrases
Thermodynamic properties
ΔH f 0

−679.7 kJ / mol

As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Potassium formate is the potassium salt of formic acid with the formula K (HCOO). It is a colorless, deliquescent substance in a crystalline , rhombic form. The density is 1.91 g / cm 3 , the melting point is 167.5 ° C. Potassium formate occurs as an intermediate in the now technically insignificant formate-potash process for the production of potassium carbonate . The part of the name -formiat goes back to the Latin word formica (ant).

Potassium formate is used as a surface de-icing agent , for example on roads and airports, and in a study by the Finnish Environment Institute (SYKE) has proven to be relatively environmentally friendly compared to de-icing agents that contain salt .

Extraction and presentation

Potassium formate can be produced from potassium hydroxide and formic acid by the salt formation reaction .

The synthesis from potassium carbonate and formic acid with the evolution of carbon dioxide is also possible.

Individual evidence

  1. a b c data sheet potassium formate from AlfaAesar, accessed on March 26, 2010 ( PDF )(JavaScript required) .
  2. a b c Entry on potassium formate in the GESTIS substance database of the IFA , accessed on May 9, 2017(JavaScript required) .
  3. David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Standard Thermodynamic Properties of Chemical Substances, pp. 5-19.
  4. Alternative de-icer found ( Memento of September 27, 2007 in the Internet Archive ), press release of the Finnish Ministry of the Environment of October 2, 2004.
  5. T. Meisel, Z. Halmos, K. Seybold, E. Pungor: "The thermal decomposition of alkali metal formats", in: Journal of Thermal Analysis and Calorimetry , 1975 , 7  (1), pp. 73-80 doi : 10.1007 / BF01911627