Potassium sulphates

Potassium sulphates — potassium sulphate (K₂SO₄) and potassium hydrogen sulphate (KHSO₄) — are the potassium analogues of sodium sulphates. They function as acidity regulators and potassium mineral supplements in food products. Potassium hydrogen sulphate provides acidity without sodium, making it useful in sodium-reduced formulations where pH control is needed.

JECFA's ADI is "not specified," evaluated in 1965. Potassium sulphates are metabolised to potassium and sulphate ions — both normal physiological constituents. The potassium is handled through renal regulation, and sulphate is excreted in urine. No adverse effects have been identified at any realistic dietary intake.

Potassium sulphates are approved in the EU and most global markets. They contribute to dietary potassium intake, which is nutritionally beneficial for most people but should be monitored by individuals with renal disease. Their use in food is relatively specialised. For healthy adults there are no safety concerns.