Monosodium phosphate
Function: Emulsifier
E339I is the European food-additive number for Monosodium phosphate, an emulsifier — helps ingredients that normally separate, like oil and water, stay mixed. MONOSODIUM PHOSPHATE, also known as monobasic sodium phosphate and sodium dihydrogen phosphate, is an inorganic compound of sodium with a dihydrogen phosphate -H2PO4−- anion.
What is E339I used for?
Monosodium phosphate (E339I) is an emulsifier — helps ingredients that normally separate, like oil and water, stay mixed. It is added during food production for a technological purpose rather than for nutrition.
Is E339I safe or restricted?
E339I is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as “Under monitoring” and does not make health claims. See the methodology for how regulatory levels are assigned.
Frequently asked questions about E339I
- What is E339I?
- E339I is the E-number for Monosodium phosphate, an emulsifier — helps ingredients that normally separate, like oil and water, stay mixed. MONOSODIUM PHOSPHATE, also known as monobasic sodium phosphate and sodium dihydrogen phosphate, is an inorganic compound of sodium with a dihydrogen phosphate -H2PO4−- anion.
- What is E339I used for?
- Monosodium phosphate (E339I) is an emulsifier — helps ingredients that normally separate, like oil and water, stay mixed. Manufacturers add it during processing rather than for nutrition. The Forkin app shows which products in your scan history actually contain it.
- Is E339I vegan or vegetarian?
- It depends on the source. Many additives can be produced from plant, mineral, or animal-derived raw materials, and the ingredient list rarely states which was used. The Forkin app shows the verified vegan and vegetarian status per product where it's known, instead of a blanket guess.
- Is E339I safe, and is it banned anywhere?
- E339I is approved for use in the EU. It sits among the additives EFSA keeps under ongoing review as new evidence is published. Forkin classifies it as "Under monitoring" and does not make health claims — see the methodology page for how regulatory levels are assigned, and the Forkin app for the full profile, including acceptable daily intake (ADI) and restrictions by country.
See the full profile in Forkin
The Forkin app surfaces the full regulatory profile of E339I — acceptable daily intake (ADI), restrictions by country, vegan/vegetarian status, alternative names, and which products in your scan history contain it.