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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.
Bicarbonate (HCO 3 â) is alkaline, and a vital component of the pH buffering system of the human body (maintaining acid-base homeostasis). 70-75% of CO 2 in the body is converted into carbonic acid (H 2 CO 3), which can quickly turn into bicarbonate.he prefix bi in bicarbonate comes from an outdated naming system and is based on the observation that there is two times as much carbonate (CO 3) per sodium ion in sodium bicarbonate (NaHCO 3) and other bicarbonates as in sodium carbonate (Na 2 CO 3) and other carbonates.