Potassium malate

Short description: Chemical compound

Potassium malate

Names
IUPAC name

dipotassium 2-hydroxybutanedioate

Other names

Dipotassium malate; E351

Identifiers

CAS Number

* 585-09-1 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 144374 N

PubChem CID

* 164689

UNII |

* 5YO4AE78DB Y

InChI

* InChI=1S/C4H6O5.2K/c5-2(4(8)9)1-3(6)7;;/h2,5H,1H2,(H,6,7)(H,8,9);;/q;2*+1/p-2 N

Key: SVICABYXKQIXBM-UHFFFAOYSA-L N

* InChI=1/C4H6O5.2K/c5-2(4(8)9)1-3(6)7;;/h2,5H,1H2,(H,6,7)(H,8,9);;/q;2*+1/p-2

Key: SVICABYXKQIXBM-NUQVWONBAI

SMILES

* C(C(C(=O)[O-])O)C(=O)[O-].[K+].[K+]

Properties

Chemical formula

| C4H4K2O5
Molar mass | 210.268 g·mol−1

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N verify (what is YN ?)
Infobox references

Tracking categories (test):

* SizeSet

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.[1] 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 a food flavoring agent.

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 malate oxidizes to potassium carbonate, then is converted to potassium nitrate by soil nitrate and transported back to the leaves.[citation needed]

## References

1. ↑ "Approved additives and E numbers". UK Food Standards Agency. https://www.food.gov.uk/business-guidance/approved-additives-and-e-numbers.

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*[CID]: Compound ID