1. <p id="he14u"><del id="he14u"><xmp id="he14u"></xmp></del></p>

        <pre id="he14u"><del id="he14u"><xmp id="he14u"></xmp></del></pre>
        <p id="he14u"></p>

        sell pyromellitic dianhydride; 1,2,4,5-benzenetetracarboxylic anhydrid; PMDA

        pyromellitic dianhydride (1,2,4,5-benzenetetracarboxylic anhydrid) be used for preparation polyimide and epoxy resin material.

        pyromellitic dianhydride;

        1,2,4,5-benzenetetracarboxylic anhydride

        Molecular Formula  C10H2O6

        Molecular Weight  218.12

        CAS Registry Number  89-32-7

        Appearance:White powder

        Purity:99.5%

        pyromellitic dianhydride (1,2,4,5-benzenetetracarboxylic anhydrid) be used for preparation polyimide and epoxy resin material.


        动漫美女扒下内裤的照片十八禁