Potassium citrate (also known as tripotassium citrate) is a potassium salt of citric acid with the molecular formula K3C6H5O7. It is a white, hygroscopic crystalline powder. It is odorless with a saline taste. It contains 38.28% potassium by mass. In the monohydrate form it is highly hygroscopic and deliquescent.
Potassium citrate is rapidly absorbed when given by mouth and is excreted in the urine. Since it is an alkaline salt it is effective in reducing the pain and frequency of urination when these are caused by highly acidic urine. It is used for this purpose in dogs and cats, but is chiefly employed as a non-irritating diuretic.
It is widely used to treat urinary calculi (kidney stones) and is often used by patients with cystinuria.[medical citation needed] A study of 500 patients with recurrent stones found that it reduced the frequency of stones from 2 per year to a half per year.
It is also used as an alkanizing agent in the treatment of mild urinary tract infections such as cystitis. It is also used in many soft drinks as a buffering agent. Indeed, 2 l of crystal lite lemonade contains about 40 meqs; medical levels.
|Molar mass||306.395 g/mol|
|Appearance|| white powder
|Melting point||180 °C (356 °F; 453 K)|
|Boiling point||230 °C (446 °F; 503 K)|
|Solubility in water||soluble|
|Solubility|| soluble in glycerin
insoluble in ethanol (95%)