Tags: Chemical Compound, Chemical Substance.

Potassium sodium tartrate is a double salt first prepared (in about 1675) by an apothecary Pierre Seignette of La Rochelle France. As a result the salt was known as Seignette’s salt or Rochelle salt.Rochelle salt is not to be confused with rock salt which is simply the mineral form of sodium chloride. Potassium sodium tartrate and monopotassium phosphate were the first materials discovered to exhibit piezoelectricity.

K-Na-L-(+)-tartrate.png
IUPAC name
Potassium sodium tartrate

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