An alkaline potassium compound, especially potassium carbonate or hydroxide.
- Glauber created a mixture of saltpeter, lime, phosphoric acid, nitrogen and potash which was the first completely mineral fertilizer.
- Fertilizers containing high amounts of nitrate of soda, muriate of potash, potassium nitrate and ammonium nitrate can cause the highest accumulated salts.
- The suitcase contained chlorate of potash and paraffin wax, which was mixed with gelignite to form an explosive compound.
Early 17th century: from pot-ashes, from obsolete Dutch potasschen, originally obtained by leaching vegetable ashes and evaporating the solution in iron pots.
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