The Probert Encyclopaedia of Science & Technology

ROCHELLE SALT

Rochelle salt (Seignette's salt) is sodium potassium tartrate. It is prepared by saturating a boiling solution of acid potassium tartrate with sodium carbonate and crystallizing. It forms large rhombic crystals which are easily soluble in water. It is used as a reducing agent, in silvering glass and formerly as a diuretic and saline purgative in medicine.
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