Product name:  potassium sodium tartrate
Alias:  Seignette salt; Rochelle salt; potassium sodium (2R,3R)-2,3-dihydroxybutanedioate hydrate (1:1:1:4); potassium sodium 2,3-dihydroxybutanedioate; Potassium Sodium Tartrate anhydrous; L(+)Potassium Sodium Tartrate
CAS Number:  304-59-6
EINECS Number:  206-156-8
Molecular formula:  C4H4KNaO6
Molecular weight:  210.159
Physical and chemical properties:
Property Tetrahydrate is white crystalline powder.
Melting point 70~80℃ 
Relative density 1.79g/cm³
Solubility Soluble in 0.9 parts of water, almost insoluble in ethanol.
Product Uses: Baking powder in the food industry, plate making and mirror making in the printing industry, and reducing agent in the thermos industry.