Trisodium citrate has the chemical formula of Na3C6H5O7. It is sometimes referred to simply as sodium citrate, though sodium citrate can refer to any of the three sodium salts of citric acid. It possesses a saline, mildly tart flavor. For this reason, citrates of certain alkaline and alkaline earth metals (e.g. sodium and calcium citrates) are commonly known as "sour salt" (occasionally citric acid is erroneously termed sour salt).
for hommade pedialyte Oral Rehydration Salts are used for replacement of water and electrolytes lost during moderate to severe diarrhea. Each packet contains the following: Sodium Chloride - 3.5 g Potassium Chloride - 1.5 g Trisodium Citrate, Dihydrate - 2.9 g Glucose Anyhydrous - 20 g The 27.9 gram dose is intended for dissolution into one liter of drinking water.