E 252 Potassium nitrate

What is E 252?

E 252 is the E number of Potassium nitrate. Curing agent, also known as saltpetre. It is used, for example, in dry-cured ham and certain cheeses.

What is E 252 used for?

E 252 belongs to the group "Other additives" and is used as preservative.

• Preservative: Preservatives prolong shelf life by protecting food against microorganisms.

Which foods may contain E 252?

According to the European Commission's database, E 252 may be used in 9 food categories and subcategories, each only in specific products and usually with maximum levels. The categories come from these areas:

• Dairy products and analogues
• Meat
• Fish and fisheries products

Is E 252 vegan?

Usually yes: the substance is normally made from plant, mineral or synthetic raw materials or with microorganisms. In individual cases, only the manufacturer or a vegan label can give certainty.

Is E 252 linked to genetic engineering?

No typical link to genetic engineering is known for this substance: it is not usually obtained from plants for which GM varieties exist, nor produced by fermentation.

How does E 252 appear on the label?

In the list of ingredients, the substance appears with its function, followed by the E number or the name, for example "Preservative: E 252" or "Preservative: Potassium nitrate".