Fumaric acid is a natural acid present in many fruits and vegetables.
Commercially made by fermentation of sugar by fungi or by chemical
Added to foods as an acidity regulator and flavouring agent,
It is generally used as a substitute for tartaric acid and occasionally
in place of citric acid. It is also used as a mordant in dyeing
and in the manufacture of synthetic resins and polyhydric alcohols.
Typical products include bread, fruit drinks, pie fillings,
poultry, wine, jams, jelly.