Comparing E525 - Potassium hydroxide vs E515II - Potassium hydrogen sulphate

Overview

E525 - Potassium hydroxide

Potassium hydroxide (E525) is a strong alkaline ingredient used to control acidity in foods. In tiny, carefully measured amounts it helps keep products stable in taste, color, and texture, and it can also be used to help peel some fruits and vegetables during processing. It’s sometimes listed on labels as potassium hydroxide or E525.

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E515II - Potassium hydrogen sulphate

Potassium hydrogen sulphate (E515II) is a food-grade acid salt used to control acidity in foods and drinks. Also called potassium bisulphate, it adjusts pH, which helps with taste, texture, and shelf stability when used in small, approved amounts. It is authorized as a food additive in the European Union.

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Synonyms
E525
Potassium hydroxide
E515ii
Potassium hydrogen sulphate
Potassium bisulphate
Functions
acidity regulator
acidity regulator
Origins
Synthetic
Mineral
Synthetic
Products

Found in 11 products

Found in 0 products

Search rank & volume
#9621.1K / mo🇺🇸U.S.
#50930 / mo🇺🇸U.S.
Awareness score

×192.66
over-aware

Awareness data is not available.

Search volume over time

Interest over time for 2 keywords in U.S. during the last 10 years.

Search history data is not available.

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Popular questions

  1. Is potassium hydroxide a strong base?

    Yes—potassium hydroxide (KOH) is a prototypical strong base that fully dissociates in water and is highly caustic in concentrated form.

  2. What is potassium hydroxide used for?

    In foods (E525) it’s used as an acidity/pH regulator and processing aid, e.g., for lye peeling of fruits and vegetables, curing olives, and in some cocoa and caramel color processing.

  3. Is potassium hydroxide safe?

    Yes—at permitted food-use levels it’s considered safe (GRAS in the U.S. and authorized in the EU); concentrated solutions are corrosive and must be handled carefully.

  4. What is the formula for potassium hydroxide?

    KOH.

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  1. What is the formula of potassium bisulphate?

    KHSO4 (potassium hydrogen sulphate).

  2. Why are there differences in the solubility of calcium chloride and of potassium bisulphate?

    Because their ions differ in charge, size and hydration: CaCl2 has very favorable hydration enthalpy (Ca2+ and Cl−), making it highly soluble and hygroscopic, while for KHSO4 the larger HSO4− anion and hydrogen-bonded crystal structure make the overall balance of lattice energy vs hydration less favorable, so it dissolves less readily (also varying with pH and temperature).

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