Is e285 vegan?

E285 is the European food additive code for sodium tetraborate, which is commonly known as borax. It is a mineral salt composed of sodium, boron, oxygen, and water. Commercially, sodium tetraborate is obtained by mining natural evaporite deposits from dried lake beds or by chemically processing other boron-rich ores, such as colemanite and ulexite, with sodium carbonate. In food manufacturing, it functions as a preservative and firming agent, traditionally used to preserve sturgeon caviar and occasionally found in certain specialty Asian noodles, rice cakes, and processed foods.

E285 is considered vegan because it is derived entirely from mineral and synthetic sources without the use of animal inputs. The extraction, refining, and industrial synthesis of sodium tetraborate do not involve animal tissues, animal byproducts, or animal-derived processing aids. As a result, the additive itself contains no animal ingredients and meets vegan standards.