Potassium dihydrogen citrate

INS 332(i)

Used as an acidity regulator — Codex also lists it as emulsifying salt, sequestrant, stabilizer.

Monopotassium citrate is an acidity regulator and sequestrant used in drinks and preserves.

Where it is and isn’t permitted

Status of Potassium dihydrogen citrate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationNot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.
Codex AlimentariusCodex Alimentarius Commission / JECFAPermitted, with conditions

17 food categories

no numerical limit (good manufacturing practice)

Show every food category
  • 01.1.3 Fluid Buttermilk (plain) — GMP
  • 01.2.1.2 Fermented milks (plain), heat-treated after fermentation — GMP
  • 01.2.2 Renneted milk (plain) — GMP
  • 01.4.1 Pasteurized cream (plain) — GMP
  • 01.4.2 Sterilized and UHT creams, whipping and whipped creams, and reduced fat creams (plain) — GMP
  • 01.8.2 Dried whey and whey products, excluding whey cheeses — GMP
  • 04.2.2.1 Frozen vegetables (including mushrooms and fungi, roots and tubers, pulses and legumes, and aloe vera), seaweeds and nuts and seeds — GMP
  • 08.1.1 Fresh meat, poultry and game, whole pieces or cuts — GMP
  • 08.1.2 Fresh meat, poultry and game, comminuted — GMP
  • 09.2 Processed fish and fish products, including molluscs, crustaceans, and echinoderms — GMP
  • 11.4 Other sugars and syrups (e.g. xylose, maple syrup, sugar toppings) — GMP
  • 12.1.2 Salt substitutes — GMP
  • 13.1.1 Infant formulae — GMP
  • 13.1.2 Follow-up formulae — GMP
  • 13.1.3 Formulae for special medical purposes for infants — GMP
  • 13.2 Complementary foods for infants and young children — GMP
  • 14.1.5 Coffee, coffee substitutes, tea, herbal infusions, and other hot cereal and grain beverages, excluding cocoa — GMP
CXS 192-1995 Table Three, INS 332(i)and 17 further provisionsretrieved 2026-09-07

What it is made from

Made by partially neutralising fermentation-derived citric acid with potassium.

  • Vegan
  • Vegetarian
InChIKey
WKZJASQVARUVAW-UHFFFAOYSA-M
PubChem
CID 23678371

Every name it appears under

19 recorded names. A label may use any of them.

INS number

  • 332(i)

CAS registry number

  • 866-83-1

Other names

  • 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, monopotassium salt
  • 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, potassium salt (1:1)
  • 2-HYDROXY-1,2,3-PROPANETRICARBOXYLIC ACID POTASIUM SALT (1:1)
  • CCRIS 6563
  • INS NO.332(I)
  • INS-332(I)
  • Monobasic potassium citrate
  • monopotassium citrate
  • potassium 3,4-dicarboxy-3-hydroxybutanoate
  • Potassium citrate (KH2(O7C6H5))
  • Potassium citrate monobasic
  • Potassium citrate monobasic, >=98.0% (NT)
  • Potassium dihydrogen 2-hydroxypropane-1,2,3-tricarboxylate
  • POTASSIUM DIHYDROGEN CITRATE
  • potassium;3-carboxy-3,5-dihydroxy-5-oxo-pentanoate
  • potassium;3-carboxy-3,5-dihydroxy-5-oxopentanoate
  • WKZJASQVARUVAW-UHFFFAOYSA-M

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • gsfa retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/potassium-dihydrogen-citrate.json