Potassium Sulfate

Potassium Sulfate carries a safety score of 3/5 and appears in 31 indexed US food products.

Safety score 60.0%

3/5 from FDA SAFFA + CSPI Chemical Cuisine

How common is Potassium Sulfate vs other flagged additives?

Number of indexed products containing each of the most common flagged additives - Potassium Sulfate highlighted.

Caramel Coloring22612Red 4021595Yellow 518987Carrageenan17853Blue 116643Yellow 613560Sucralose10490Potassium Sulfate31
Indexed products containing each flagged additive. Source: Open Food Facts ingredient lists × FDA SAFFA × CSPI Chemical Cuisine.
FDA Status
GRAS
Safety Score
3/5

Function

FLAVOR ENHANCER, FLAVORING AGENT OR ADJUVANT, MALTING OR FERMENTING AID

Safety Assessment

Potassium Sulfate has a moderate safety profile (3/5). While approved for use, some studies or consumer advocacy groups have raised questions about certain aspects of this ingredient. Consumers who prefer caution may wish to limit intake.

What the Data Says About Potassium Sulfate

Potassium Sulfate currently appears in 31 products across the OpenFoodFacts catalog we index, which gives a concrete measure of its footprint on US grocery shelves. Our internal safety score of 3/5 synthesizes FDA Substances Added to Food (SAFFA) regulatory status - currently "GRAS" - with the Center for Science in the Public Interest (CSPI) Chemical Cuisine classification. Regulators ask whether exposure at typical intake is acceptable, while consumer-advocacy groups like CSPI weigh cumulative dietary load and vulnerable-population risk -- two related but distinct questions.

In food manufacturing, Potassium Sulfate functions as a flavor enhancer, flavoring agent or adjuvant, malting or fermenting aid. That technical role explains why it recurs across many product categories, formulators select specific additives for stability, shelf life, color, or texture performance, and substitution is rarely a one-for-one swap when regulations or consumer preferences shift. Inspection and outbreak data often trace back to breakdown in the control of exactly these kinds of functional ingredients, either through contaminated batches, undisclosed substitutions, or labeling errors that trigger FDA-initiated recalls.

No specific concern flags are attached to Potassium Sulfate in our current data snapshot beyond the regulatory and CSPI classifications above. That does not rule out individual sensitivity reactions, and anyone managing allergies, elimination diets, or chronic conditions should verify with a qualified healthcare professional before relying on population-level ratings.

Safety Profile at a Glance

Regulatory and safety classifications for Potassium Sulfate
Source Classification Year
FDA SAFFA GRAS 2024
CSPI Chemical Cuisine Not rated 2024
PlainFoodSafe Score 3/5 2026
Product footprint 31 products OpenFoodFacts

FDA SAFFA database, CSPI Chemical Cuisine ratings, OpenFoodFacts product index. See methodology.

Frequently Asked Questions

Is Potassium Sulfate safe to eat?

Potassium Sulfate has a safety score of 3/5. FDA status: GRAS. Always check with a healthcare provider if you have specific dietary concerns.

What products contain Potassium Sulfate?

Potassium Sulfate is found in 31 products in our database, spanning various food categories and brands.

What does Potassium Sulfate do in food?

Potassium Sulfate is used as a flavor enhancer, flavoring agent or adjuvant, malting or fermenting aid in food products.

Citation notes Regulatory status from FDA SAFFA; safety ratings from CSPI Chemical Cuisine; product presence from Open Food Facts. See our methodology. Retrieved and formatted by PlainFoodSafe Editorial.

Every figure on PlainFoodSafe is rendered directly from OpenFoodFacts and FDA data, no number is typed in by an editor. Ingredient figures are computed directly from OpenFoodFacts, FDA SAFFA, and CSPI Chemical Cuisine data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.