It is used in the manufacturing of unsaturated polyester resin which is used in Automobiles, Tanks and Pipes, Epoxy resin, Lubricating oil additives and in food industries. Another market for maleic anhydride is lubricating oil additives, which are used in gasoline and diesel engine crankcase oils as dispersants and corrosion inhibitors. The food industry uses malic acid which is derivative of maleic anhydride in artificial sweeteners and flavour enhancements. Personal care products consuming maleic anhydride include hair sprays, adhesives and floor polishes.
Maleic anhydride is also a precursor to compounds used for water treatment detergents, insecticides and fungicides, pharmaceuticals, and other copolymers.
IGPL produces Maleic Anhydride through wash water generated out of the production process of Phthalic Anhydride. Existing capacity of Maleic Anhydride is 7,660 MTPA.
| Sr. No. | Characteristics | Test Method | Guaranteed Specifications |
| 1. | Physical Appearance | Visual | White Flakes |
| 2. | Solidification Point (°C) | IS 5149 : 2020 | 52.2°C |
| 3. | Colour of Molten Material (APHA) | IS 5149 : 2020 | 20 HU Max. |
| 4. | Maleic Acid Content (Wt. %) | IS 5149 : 2020 | 0.5% |
| 5. | Purity Wt.% as C4H2O3 | IS 5149 : 2020 | 99.5% |
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