Potassium, with the chemical symbol K and CAS number 7440-09-7, is an alkali metal that is highly reactive and essential for biological functions. It is characterized by its soft, silvery-white appearance and is one of the lightest metals, with a low density that allows it to be easily cut with a knife. Potassium has a melting point of approximately 63.5°C and a boiling point around 759°C. It readily reacts with water, producing potassium hydroxide and hydrogen gas, which can ignite due to the heat generated during the reaction. This metal is also known for its high electrical conductivity and is a vital nutrient in plant biology, playing a crucial role in cellular functions and osmoregulation. In its elemental form, potassium must be stored under oil or in an inert atmosphere to prevent oxidation and violent reactions with moisture. Its compounds, such as potassium chloride and potassium nitrate, are widely used in fertilizers, food processing, and various industrial applications.

Potassium

7440-09-7: Atomic potassium, K element, Kalium, Potasio, Potassium hyperkalemia, MeSH ID: D011188, Potassium

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CAS 7440-09-7: Potassium

Potassium, solid, 99.5% (metals basis)

Ref: 02-010299

Potassium Standard: K+ @ 1000 µg/mL in H2O

Ref: TR-VHG-IKW1K

Potassium - K @ 5000 µg/g in Hydrocarbon Oil

Ref: TR-VHG-OK-5000

Potassium

Ref: 54-IN2887

Potassium Standard: K @ 1000 µg/mL in 5% HNO3

Ref: TR-VHG-PKN-500