B9750

Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride

98%

• Synonym(s): 4,4′-Carbonyldiphthalic anhydride
• Empirical Formula (Hill Notation): C₁₇H₆O₇
• CAS Number: 2421-28-5
• Molecular Weight: 322.23
• Beilstein/REAXYS Number: 761777
• EC Number: 219-348-1
• MDL number: MFCD00005923
• UNSPSC Code: 12162002
• PubChem Substance ID: 24892154
• NACRES: NA.23

Properties

• vapor density: 1.4 (vs air)
• Quality Level: 200
• vapor pressure: <0.1 mmHg ( 0 °C)
• assay: 98%
• form: powder
• autoignition temp.: 975 °F
• expl. lim.: 16 %
• mp: 218-222 °C (lit.)
• SMILES string: O=C1OC(=O)c2cc(ccc12)C(=O)c3ccc4C(=O)OC(=O)c4c3
• InChI: 1S/C17H6O7/c18-13(7-1-3-9-11(5-7)16(21)23-14(9)19)8-2-4-10-12(6-8)17(22)24-15(10)20/h1-6H
• InChI key: VQVIHDPBMFABCQ-UHFFFAOYSA-N

Description

General description

Benzophenone-3,3′,4,4′-tetracarboxylic acid is formed by hydrolysis, it can be converted to the dianhydride by treating with Ac₂O (molar ratio 4 to 1 of acid).The dianhydride is used to synthesize polyimides, which are highly flexible in nature due to the presence of keto and carbonyl groups in the dianhydride molecule. The keto and carbonyl groups subsequently increase the spacing between the imide rings enhancing the solubility and processibility.

Application

Used in the synthesis of polyimides.

Safety Information

• pictograms: GHS07
• signalword: Warning
• hcodes: H319,H335
• pcodes: P261 - P264 - P271 - P280 - P304 + P340 + P312 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• ppe: dust mask type N95 (US), Eyeshields, Gloves