I-anhydride ye-Maleic, eyaziwa ngokuba yi-MA, yikhompawundi eguquguqukayo yezinto eziphilayo esetyenziswa ngokubanzi kwimveliso ye-resin. Ihamba ngamagama ahlukeneyo, kubandakanywa i-malic anhydride ephelelwe ngamanzi kunye ne-maleic anhydride. I-formula yekhemikhali ye-anhydride ye-maleic yi-C4H2O3, ubunzima be-molecular yi-98.057, kunye ne-melting point range yi-51-56 ° C. I-UN yeeMpahla ezinobungozi ze-UN i-2215 ihlelwa njengento enobungozi, ngoko ke kubalulekile ukuphatha le nto ngononophelo.