Potassium bicarbonate

Potassium bicarbonate (KHCO3, E501ii) is an inorganic potassium salt registered under CAS 298-14-6 and EC 206-059-0. It is also known as potassium acid carbonate or monopotassium carbonate and appears on ingredient declarations as E501ii across food, pharmaceutical, and cosmetic applications.

In food and beverage production, KHCO3 acts as a leavening agent and pH buffer, releasing CO2 when heated to create lift in baked goods without the sodium load of sodium bicarbonate. In agriculture, it functions as a contact fungicide, disrupting fungal cell membranes through osmotic imbalance, and is approved for use in organic crop protection programmes.

Potassium bicarbonate is available in food-grade (FCC), pharmaceutical-grade (Ph.Eur.), and technical grades. It complies with REACH regulations and carries E501ii status under EU food law. Standard packaging includes 25 kg bags, with bulk options available depending on supplier. Buyers should confirm grade suitability against their specific regulatory requirements.