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[Chemical Knowledge]：What are the upstream raw materials for fumaric acid? What do the downstream products contain?

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Fumaric acid has an important position in the field of chemical production raw materials, and its upstream and downstream related products are widely used. The main upstream and downstream associated products of fumaric acid will be described in detail below.

upstream products:

1. Maleic Anhydride (maleic anhydride): Maleic anhydride is the main raw material for the production of fumaric acid. Fumaric acid can be obtained by adding water to the ring-opening reaction.

downstream products:

1. unsaturated polyester resin (Unsaturated Polyester Resin): fumaric acid can be used as a reaction monomer, with other unsaturated dibasic acid, diol and other raw materials for polycondensation reaction to generate unsaturated polyester resin. This resin has good chemical resistance, heat resistance, electrical insulation and other characteristics, widely used in FRP, coatings, adhesives and other fields.
2. dimethyl fumarate (Dimethyl Fumarate): fumaric acid reacts with methanol to generate dimethyl fumarate, which is a commonly used food preservative that can effectively inhibit the growth of molds and bacteria and extend the shelf life of food.
3. Ferrous fumarate (Ferrous Fumarate): Fumaric acid reacts with iron salt to generate ferrous fumarate, which is a commonly used food nutrition fortifier to supplement the iron required by the human body and prevent iron deficiency anemia.
4. Ethyl fumarate (Ethyl Fumarate): Fumaric acid reacts with ethanol to produce ethyl fumarate, which is a fragrant compound that can be used as a food additive and flavor.

In short, fumaric acid has a wide range of upstream and downstream related products, involving many fields, such as coatings, adhesives, food preservation, nutrition fortification, etc. The production and application of these products provide important support for the development of chemical, food and other industries.

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