... .Widly used in producing various carbonic acid drink 3.used in manufacturing unsaturated polyester resin. ... acidulant, acidity regulator, acidifier, thTrans-Butenedioic Acid(Fumaric Acid)Specification: trans-butenedioic acid has bacteriostatic and antiseptic function. It can ... curing accelerant and spice. Widly used in producing various carbonic acid drink, wine, concentrated solid drink, ice cream and ...