C16H6O7
310.21 g/mol
Industrial Chemical
4,4'-Oxydiphthalic anhydride
CAS1823-59-2EC412-830-4
Category
Industrial Chemical
Compound Class
Aromatic
Primary Use
Monomer for polyimide synthesis
4,4'-Oxydiphthalic anhydride is an organic compound containing two phthalic anhydride units linked by an ether bridge. It is primarily used as a monomer in the synthesis of polyimide polymers.
Monomer for polyimide synthesis
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Safety Reference
H412Harmful to aquatic life with long lasting effects
Customs Tariff Classification
The international HS code for 4,4'-Oxydiphthalic anhydride (CAS 1823-59-2) is 2918.99.
HS code (international, 6-digit)
2918.99
EU CN code (8-digit)
2918 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
5-[(1,3-dioxo-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione
InChIKey
QQGYZOYWNCKGEK-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=C1OC3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
Synonyms (24)
- 4,4'-Oxydiphthalic anhydride
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