PharmaceuticalsMineral FortifiersSpeciality ChemicalsPotassium Sodium Tartrate USP


Potassium Sodium Tartrate USP

Potassium Sodium Tartrate is a double salt known as Rochelle salt that exhibits piezoelectricity. It is a colorless to blue white salt crystallizing in the orthorhombic system.


Potassium sodium tartrate exhibits piezoelectricity and so was used as transducers in microphones and earpieces. It is also used as a food additive and medicinally as a laxative. It is also used in the process of silvering mirrors, an ingredient of Fehling’s solution, as a common precipitant in protein crystallography and an ingredient in Biuret reagent.


Chemical Name: Potassium Sodium Tartrate
Synonyms: Rochelle salt, Seignette salt
Mol. Formula: C4H4KNaO6.4H­2O
Mol. Weight: 282.22 g/mol
CAS No.: 304-59-6


General Specifications

Test Specification…FCC
Appearance It appears as translucent or white crystals
Solubility Soluble in cold water, hot water. Almost insoluble in alcohol
Alkalinity Passes test
Water Between 21% and 27%
Ammonia Maximum 0.002%
Heavy metals Maximum 0.001%
Organic volatile impurities Passes  test
Residual solvents Passes test
Assay Not less than 99% and not more than 102%


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


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We observe WHO Good manufacturing practice and Good laboratory practice.

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