E508 · Preservatives, Stabilisers, Thickeners

Potassium chloride

No known risk

Salt substitute mineral.

Category: Preservatives, Stabilisers, Thickeners
Vegan: Yes
Vegetarian: Yes

What it is

A chloride or sulphate mineral salt used as a firming agent, flavor enhancer, or salt substitute.

How it is used in food

Used widely as a sodium-free salt substitute to reduce the sodium content of foods.

Commonly found in

Canned vegetables
Cheese making
Brewing water
Low-sodium salt

Health and safety

None for most people; potassium is an essential mineral most diets are short of. Anyone with reduced kidney function, or taking potassium-sparing diuretics or ACE inhibitors, should count it, since those are exactly the situations where potassium builds up.

No safety concern identified at food use levels; permitted at quantum satis.

Regulatory status

Region	Status	Notes
Australia & New Zealand FSANZ	Permitted	Permitted under the FSANZ Food Standards Code.
European Union EFSA / European Commission	Permitted	Authorised for food use under EU regulations (Annex II).
United States FDA (Food and Drug Administration)	Permitted	Authorised for food use by the FDA (often GRAS for standard additives).

Identification on labels

E-number: E508

Worth knowing

While it tastes salty, excessive amounts impart a bitter, metallic aftertaste.

Conclusion

There is no reason for most people to avoid potassium chloride, as it serves as a valuable low-sodium salt substitute. However, individuals with reduced kidney function or those taking ACE inhibitors or potassium-sparing diuretics should monitor their intake. EFSA identifies no safety concern at normal food levels where it helps lower sodium.

References

EFSA evaluation of E507 — EFSA

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Entry last reviewed 2026-07-28.

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