Potassium Citrate BP

Potassium citrate (also known as tripotassium citrate) is a potassium salt of citric acid with the molecular formula K3C6H5O7. It is a white, hygroscopic crystalline powder. It is odorless with a saline taste.


As a food additive, potassium citrate is used to regulate acidity and is known as E number E332.
It is also used in many soft drinks as a buffering agent.


Chemical Name: Potassium Citrate
Mol. Formula: C6H5K3O7.H2O
Mol. Weight:  324.4 g/mol
CAS no.: 6100-05-6



Test Specification
Characters It occurs as a white or almost white, granular powder or transparent crystals, hygroscopic.

Test (A)

Test (B)


(a)It gives the reaction  of citrates

(b)It gives the reaction of potassium

Solubility Very soluble in water, practically insoluble in ethanol (96%)
Appearance of solution Solution is clear and colorless.
Acidity or alkalinity Specified test.
Readily carbonisable substances Specified test.
Chlorides Not more than 50 ppm
Oxalates Not more than 300 ppm
Sulfates Not more than 150 ppm
Heavy metals Not more than 10 ppm
Sodium Not more than 0.3%
Water 4.0% to 7.0%
Assay Not less than 99.0% and not more than 100.5% calculated on anhydrous basis


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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