Carbonate of potassium (carbonate potassium, potash) of K2CO3 2836400000
Potassium carbonate (potassium carbonate, potash) K2CO3 is a medium salt of potassium and carbonic acid.
It is a white crystalline substance, highly soluble in water.
Potash is used for making liquid soap, crystal or refractory glass, dyeing, growing crops (potassium salts are a good fertilizer for plants), for photography, as an additive in mortar to reduce the freezing point (however, white spots can then appear, therefore now there are special anti-freeze additives that do not give streaks).
Registered as a food additive E501.