Potassium citrate
Potassium citrate suppliers and sourcing guide
Potassium citrate is the potassium salt of citric acid, made by neutralizing citric acid with potassium hydroxide or potassium carbonate and crystallizing the product. The usual commercial form is tripotassium citrate monohydrate, transparent crystals or a white granular powder that is odorless and deliquescent, with about 36% potassium. Brands buy it for electrolyte drinks, as a buffer and acidity regulator in foods and beverages, and for supplements.
- Category
- Vitamins and minerals
- Also known as
- Tripotassium citrate · Potassium citrate monohydrate · E332
- Facts checked
- November 2026
Forms and grades of potassium citrate
Suppliers sell different products under the same name. Specify the one you need.
Monohydrate, granular
The standard food and USP form, free-flowing granules for dry blends.
Monohydrate, fine powder
Milled grade for quicker dissolution and even blending in drink mixes.
Anhydrous
Dried grade with more potassium per gram, used where water content matters.
Solutions
Aqueous potassium citrate at a stated concentration for beverage processing.
What to check on the COA
Compare each result with your own specification when the lot arrives.
- Assay
- Tripotassium citrate on the dried basis by nonaqueous (perchloric acid) titration, against a Food Chemicals Codex or USP specification.
- Loss on drying or water
- Water content, confirming the monohydrate.
- Oxalate and tartrate
- Limit tests for related organic acid salts.
- Alkalinity or pH
- Solution pH or alkalinity, which shows free alkali left from manufacture.
- Lead and other metals
- Lead and arsenic by ICP-MS.
Storage, lots and expiry
Storage and shelf life
Potassium citrate absorbs moisture from humid air, so keep it in tightly closed, lined containers in a cool, dry area and reseal opened packs right away. Caked material can usually be broken up but should be checked for assay. Shelf life is set by the supplier's specification, with moisture and assay retested on aged stock.
Lots and expiry dates
Record assay and water for each lot so potassium per serving is calculated correctly. Watch for caking on arrival, which signals moisture exposure in transit.
Regulatory status
Facts from regulators and standards bodies, each linked to its source.
21 CFR 184.1625 affirms potassium citrate as GRAS, used in food with no limitation other than current good manufacturing practice.
Source: ecfr.gov (opens in a new tab)7 CFR 205.605(b) lists potassium citrate among the synthetic substances allowed in or on processed products labeled organic.
Source: ecfr.gov (opens in a new tab)Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists potassium citrate and potassium citrate, monohydrate among the source ingredients for potassium (Table 2).
Source: webprod.hc-sc.gc.ca (opens in a new tab)
This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.
Potassium citrate suppliers
Manufacturers and distributors whose own websites say they sell it.
We are checking potassium citrate suppliers now
Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.
Sell potassium citrate? Request a listingFrequently asked questions
What forms of potassium citrate can brands buy?
Common forms include monohydrate, granular, monohydrate, fine powder, anhydrous and solutions. Ask each supplier for the specification sheet of the exact grade they quote.
What should the COA for potassium citrate include?
Expect assay, loss on drying or water, oxalate and tartrate, alkalinity or pH and lead and other metals, each with its method, specification and result for that lot.
How should potassium citrate be stored?
Potassium citrate absorbs moisture from humid air, so keep it in tightly closed, lined containers in a cool, dry area and reseal opened packs right away. Caked material can usually be broken up but should be checked for assay. Shelf life is set by the supplier's specification, with moisture and assay retested on aged stock.
What is the regulatory status of potassium citrate?
21 CFR 184.1625 affirms potassium citrate as GRAS, used in food with no limitation other than current good manufacturing practice. 7 CFR 205.605(b) lists potassium citrate among the synthetic substances allowed in or on processed products labeled organic. Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists potassium citrate and potassium citrate, monohydrate among the source ingredients for potassium (Table 2).
More vitamins and minerals
- Magnesium GlycinateMagnesium bisglycinate · Magnesium bisglycinate chelate
- Vitamin CL-ascorbic acid · Ascorbic acid
- Vitamin D3Cholecalciferol · Colecalciferol
- ZincZinc citrate · Zinc gluconate
- Vitamin A palmitateRetinyl palmitate · Retinol palmitate
- Vitamin A acetateRetinyl acetate · Retinol acetate
- Beta-caroteneβ-Carotene · all-trans-beta-carotene
- Vitamin D2Ergocalciferol · Calciferol
- Vitamin E (d-alpha tocopherol)d-alpha-tocopherol · RRR-alpha-tocopherol
- Mixed tocopherolsTocopherols concentrate, mixed · Mixed tocopherol concentrate
- Vitamin K1Phylloquinone · Phytonadione
- Vitamin K2 (MK-7)Menaquinone-7 · MK-7
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