| post date: | dec 26,2021 |
| expiry date: | jun 24,2022 |
| detailed description: |
cas no. :2421-28-5
purity: 98%min. / 99.5%min. appearance: light yellow powder / white powder packing size: 1kg/bag；20kg/drum ; 115kg/drum application: polyimide foam, epoxy resin material, etc. for details, please contact the sales manager: mr.ye 18222275652; ms. cao 18222265956; sales department: 022-83726202-8855 |
| cas registry number: | 2421-28-5 |
| synonyms: | ;btda;4,4-carbonyldiphthalic anhydride;benzophenone-3,3:4,4-tetracarboxylic dianhydride;btda;3,3,4,4-benzophenontetracarbonsaeuredianhydride;1,3-isobenzofurandione, 5,5'-carbonylbis-;3,3',4,4'-benzophenonetetracarboxylic acid dianhydride;3,3',4,4'-tetracarboxybenzophenone dianhydride;3,3',4,4'-benzophenonetetracarboxylicaciddianhydride;3-isobenzofurandione,5,5'-carbonylbis-1;4,4'-carbonylbis[phthalic anhydride];4,4'-diphthalic anhydride ketone;5,5'-carbonylbis-3-isobenzofurandione;5,5'-carbonylbis(2-benzofuran-1,3-dione);3,3',4,4'-benzophenone tetracarboxylic dianhydride;benzophenone-3,3',4,4'-tetracarboxylic dianhydride;3,3,4,4-benzophenonetetracarboxylic dianhydride; |
| molecular formula: | c17h6o7 |
| molecular weight: | 322.2253 |
| molecular structure: | 
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| hazard symbols: | |
| risk codes: | r36/37:; |
| safety description: | s25:; |
