Potassium ethoxide

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title: "Potassium ethoxide" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["ethoxides", "potassium-compounds"] topic_path: "general/ethoxides" source: "https://en.wikipedia.org/wiki/Potassium_ethoxide" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Name = Potassium ethoxide | ImageFile = Potassium ethoxide.svg | ImageSize = 120px | PIN = Potassium ethoxide | OtherNames = Potassium ethylate |Section1={{Chembox Identifiers | CASNo = 917-58-8 | EC_number = 213-029-0 | PubChem = 23670592 | ChemSpiderID = 63375 | SMILES = CC[O-].[K+] | InChI = 1/C2H5O.K/c1-2-3;/h2H2,1H3;/q-1;+1 | InChIKey = RPDAUEIUDPHABB-UHFFFAOYAN | StdInChI = 1S/C2H5O.K/c1-2-3;/h2H2,1H3;/q-1;+1 | StdInChIKey = RPDAUEIUDPHABB-UHFFFAOYSA-N}} |Section2={{Chembox Properties | C=2 | H=5 | O=1 | K=1 | Appearance = Yellow or Off-White Powder | Density = 0.894 g/mL | MeltingPtC = 250 | BoilingPt = | Solubility = Reacts }} |Section3={{Chembox Hazards | GHSPictograms = | GHSSignalWord = Danger | HPhrases = | PPhrases = | MainHazards = | FlashPt = | AutoignitionPt = }}

Potassium ethoxide, also known as potassium ethanolate, is an off-white or yellow powder with the chemical formula of C2H5KO. Potassium ethoxide contains an ethoxide ion, the conjugate base of ethanol, which makes these compounds strongly basic. It hydrolyzes to yield ethanol and potassium hydroxide.

Uses

Potassium ethoxide is used as a strong base, similar to sodium and potassium methoxides, and potassium tert-butoxide. Catalytic amounts of potassium ethoxide in ethanol can be used to perform transesterification reactions that yield ethyl esters. Sodium or potassium ethoxide is also a suitable base for the malonic ester synthesis where diethyl malonate is used, since any transesterification reaction does not result in ester scrambling.

Safety

Potassium ethoxide is stable, but also both flammable and corrosive. The compound reacts vigorously with water. If the compound comes into contact with damp air, it may lead to the heating and ignition of the solid powder. It must be kept separated from air, moisture, water, acids, oxidizing agents, and reducing agents. It can also cause severe skin burns.

References

References

  1. [http://www.worldofchemicals.com/wochem/pub/chempotassium-ethoxide.html], n.pag. World Of Chemicals. Web. 19 Oct 2012. http://www.worldofchemicals.com/wochem/pub/chempotassium-ethoxide.html.
  2. {{PubChem. 23670592
  3. [http://www.caslab.com/Potassium_ethoxide_CAS_917-58-8/], n.pag. CasLAb. Web. 19 Oct 2012. http://www.caslab.com/Potassium_ethoxide_CAS_917-58-8/.
  4. [http://www.chemexper.com/chemicals/supplier/cas/917-58-8.html], n.pag. chemexper. Web. 19 Oct 2012. http://www.chemexper.com/chemicals/supplier/cas/917-58-8.html.

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ethoxidespotassium-compounds