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Acidity Regulator (INS 501(i))

Also Known As : Potassium carbonate, Carbonate of potash, Carbonic acid potassium salt (1:2), Dipotassium carbonate, Pearl ash, Salt of tartar


Taste Profile

It has a salty taste.

Usage Tips

  1. Acidity Regulator (INS 501(i)) is used in the production of grass jelly, a food which is commonly consumed in Chinese and Southeast Asian cuisines, as well as in making Chinese hand-pulled noodles, and moon cake.
  2. It is used to produce a certain variety of cocoa powder known as, Dutch-processed cocoa powder (an alkalinity reduced cocoa powder).

Common names and forms

  1. Acidity Regulator 501(i)
  2. Acidity Regulator E501
  3. Acidity Regulator E501(i)
  4. Potassium Carbonate


Acidity Regulator (INS 501(i)) is a food additive produced synthetically by the electrolysis of potassium chloride, which is a natural mineral. It is used as an acidity regulator (that which regulates the acidity or alkalinity of a food) and buffering agent (that which maintains the acidity of the food) in many foods like in bakery products, soft drinks, confectionery, custard powder, cocoa powder, in alcoholic beverages like mead and wine. It is used by pharmaceutical companies as a source of potassium. It exists as a white powder or as colorless solid crystals.


On coming in contact with skin and eyes, or on being swallowed or inhaled Acidity Regulator (INS 501(i)) can cause toxicity. In supplement form, it should not be overconsumed which is dangerous.(1)

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