Potassium sodium tartrate

Potassium sodium tartrate, or Rochelle salt, is historically known for its piezoelectric properties. Today, however, used for various applications such as electroplating baths and silver plating mirrors. It can also act as a retardant for construction material and in food as a food additive, E337, for production of pectins and jellies.

C4H4KNaO6 · 4H2O


Chemical Formula

C4H4KNaO6 · 4H2O

EC Number


CAS Number


  • Surface treatment & Coatings
  • Home & Personal care
  • Electroplating
  • Electronics
  • Food additive


  • Assay: 99-102%
  • Water: 21-27%
  • Heavy metals: max. 0.001%

Request quote now and speed up delivery

Let us know what you need, and we’ll respond swiftly—typically within one business day. The more details you provide upfront, the quicker we can assist you. Rest assured, your inquiry will receive our full attention.

Attach file No file chosen

Can’t find the product you’re looking for? Let us know!