Sodium_sesquicarbonate
Sodium sesquicarbonate
Chemical compound
Sodium sesquicarbonate (systematic name: trisodium hydrogendicarbonate) Na3H(CO3)2 is a double salt of sodium bicarbonate and sodium carbonate (NaHCO3 · Na2CO3), and has a needle-like crystal structure. However, the term is also applied to an equimolar mixture of those two salts, with whatever water of hydration the sodium carbonate includes, supplied as a powder.
This article needs additional citations for verification. (May 2017) |
The dihydrate, Na3H(CO3)2 · 2H2O, occurs in nature as the evaporite mineral trona.[1]
Due to concerns about the toxicity of borax which was withdrawn as a cleaning and laundry product, sodium sesquicarbonate is sold in the European Union (EU) as "Borax substitute".[2] It is also known as one of the E number food additives E500(iii).