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The name comes from the English words pot and ash, referring to its discovery in the water- soluble fraction of wood ash.

The term has become somewhat ambiguous due to the substitutionIn general, substitution is the replacement of one thing with another. There are many specific examples: In organic chemistry, a reaction where one functional group takes the place of another. A major type of substitution is nucleophilic substitution. in fertilizers of cheaper potassium saltFor other meanings of the word salt see salt (disambiguation In chemistry, a salt is a composed of positively charged cations and negatively charged anions, so that the product is neutral and without a net charge. They are typically the product of a chemis such as potassium chlorideThe chemical compound potassium chloride (KCl) is a metal halide which is used in medicine, scientific applications, food processing and in judicial execution through lethal injection. It occurs naturally as the mineral sylvite and in combination with sod ( K ClChlorine (from Gr. Chloros meaning "pale green"), is the chemical element with atomic number 17 and symbol Cl . It is a halogen, found in the periodic table in group 17. Chlorine gas is greenish yellow, is two and one half times as heavy as air, has an in) or potassium oxidePotassium oxide or potash (formula K O) is a compound of potassium and oxygen used mainly as a fertilizer. It is obtained from the combustion of plant material. Facts Density (g/cm3) 2. 32 Mean Excitation Energy (eV) 189. 9 Composition Atomic numberFracti ( K₂ O), to which the same common name is now sometimes also applied.

The element potassium derives its English name from potash.