Potassium malate

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Potassium malate
Potassium malate.svg
CAS number 585-09-1 YesY
PubChem 164689
Jmol-3D images Image 1
Molecular formula C4H4K2O5
Molar mass 210.27 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Potassium malate is a compound with formula K2(C2H4O(COO)2). It is the potassium salt of malic acid.

As a food additive, it has the E number E351. It is used as acidity regulator or acidifier for use in, for example, canned vegetables, soups, sauces, fruit products and soft drinks. It also acts as an antioxidant and as a food flavor. It is an important compound in the transport of nitrate from the roots of a plant to the leaves of the plant. Potassium malate is the salt that transports from the leaves to the root. At the root the potassium maleate oxidizes to potassium carbonate, then is converted to potassium nitrate by soil nitrate and transported back to the leaves.