I-Maleic anhydride, eyaziwa nangokuthi i-MA, iyinhlanganisela yezinto eziphilayo esetshenziswa kabanzi ekukhiqizeni inhlaka. Ihamba ngamagama ahlukahlukene, okuhlanganisa i-malic anhydride ephelelwe amanzi kanye ne-maleic anhydride. I-chemical formula ye-maleic anhydride yi-C4H2O3, isisindo se-molecule singu-98.057, futhi ibanga lephoyinti lokuncibilika lingama-51-56°C. I-UN Yezimpahla Eziyingozi Inombolo 2215 ihlukaniswa njengento eyingozi, ngakho-ke kubalulekile ukuphatha le nto ngokucophelela.