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4,4'-Carbonyldiphthalic anhydride

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4,4'-Carbonyldiphthalic anhydride molecular structure
Molecular structure

The Sigma-Aldrich catalog lists 3 grades and pack sizes of 4,4'-Carbonyldiphthalic anhydride (CAS 2421-28-5). Pick the code you need and request a quote for price and lead time from Klar Chem.

CAS2421-28-5
Molecular formulaC17H6O7
Molecular weight322.23 g/mol
IUPAC name5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione
Synonyms3,3',4,4'-Benzophenonetetracarboxylic dianhydride · Benzophenonetetracarboxylic dianhydride · 1,3-Isobenzofurandione, 5,5'-carbonylbis- · Benzophenonetetracarboxylic acid dianhydride · 4,4'-Carbonylbis(phthalic anhydride) · 4,4'-Diphthalic anhydride ketone
Safety & Hazards (GHS) Warning
Irritant Irritant
  • H319 Causes serious eye irritation
  • H335 May cause respiratory irritation

⚠️ For information only (source: EU CLP harmonised classification and ECHA notifications, via PubChem); not a substitute for the official Safety Data Sheet (SDS).

Catalog codes and grades

Brand Product / grade Code
Sigma BENZOPHENONE-3,3',4,4'-TETRACARBOXYLIC B9750-100G
B9750-500G
B9750-5KG		 Request Quote

For information only; specifications and availability are confirmed at quotation. Prices are not listed.