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Not to be confused with Sodium bicarbonate. Potassium bicarbonate (also known as potassium hydrogen carbonate or potassium acid carbonate) is a colorless, odorless, slightly basic, salty substance.According to the U.S. Food and Drug Administration (FDA), potassium bicarbonate is  generally recognized as safe .There is no evidence of human carcinogenicity, no adverse effects of overexposure, and an undetermined LD50. It is among the food additives encoded by European Union, identified by the initials E 501.ccording to the U.S. Food and Drug Administration (FDA), potassium bicarbonate is  generally recognized as safe . There is no evidence of human carcinogenicity, no adverse effects of overexposure, and an undetermined LD50. It is among the food additives encoded by European Union, identified by the initials E 501.
In inorganic chemistry, bicarbonate (IUPAC-recommended nomenclature: hydrogen carbonate) is an intermediate form in the deprotonation of carbonic acid. It is a polyatomic anion with the chemical formula H C O 3 â .Bicarbonate serves a crucial biochemical role in the physiological pH buffering system.The term bicarbonate was coined in 1814 by the English chemist William Hyde Wollaston.t is isoelectronic with nitric acid HNO 3. The bicarbonate ion carries a negative one formal charge and is the conjugate base of carbonic acid H 2CO 3; at the same time, it is the conjugate acid of CO2â 3, the carbonate ion, as shown by these equilibrium reactions: