C17H6O7
322.22 g/mol
Industrial ChemicalWarning
3,3',4,4'-Benzophenonetetracarboxylic dianhydride
CAS2421-28-5EC219-348-1
Category
Industrial Chemical
Compound Class
Ester
Primary Use
curing agent for epoxy resins
3,3',4,4'-Benzophenonetetracarboxylic dianhydride (BTDA) is an aromatic organic acid dianhydride. It is primarily used as a curing agent for epoxy resins in industrial applications.
curing agent for epoxy resins
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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Related Compounds
SimilarStructure SimilarSimilarity 0.74
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Chemical intermediate for surfactants and lubricants
Safety Reference
Warning
H319Causes serious eye irritation
H335May cause respiratory irritation
Customs Tariff Classification
The international HS code for 3,3',4,4'-Benzophenonetetracarboxylic dianhydride (CAS 2421-28-5) is 2918.30.
HS code (international, 6-digit)
2918.30
EU CN code (8-digit)
2918 30 00
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-carbonyl)-2-benzofuran-1,3-dione
InChIKey
VQVIHDPBMFABCQ-UHFFFAOYSA-N
SMILES
C1=CC2=C(C=C1C(=O)C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
Synonyms (32)
- BTDA
- 1, 5,5'-carbonylbis-
Sourcing 3,3',4,4'-Benzophenonetetracarboxylic dianhydride?
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