Fumaric acid, also known as trans-butenedioic acid, is used in various industries including food, pharmaceuticals, and construction, and serves multiple functions such as acidity regulation and flavor enhancement. The global market for fumaric acid was valued at $660.9 million in 2020, with an expected CAGR of 5.5% from 2021-2026, driven by growth in construction activities and demand for paints and resins. It is also naturally occurring in various organisms and plays a role in energy production within the body.