B9750
Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride
98%
Synonym(s):
4,4′-Carbonyldiphthalic anhydride
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About This Item
Empirical Formula (Hill Notation):
C17H6O7
CAS Number:
Molecular Weight:
322.23
UNSPSC Code:
12162002
NACRES:
NA.23
PubChem Substance ID:
EC Number:
219-348-1
Beilstein/REAXYS Number:
761777
MDL number:
InChI key
VQVIHDPBMFABCQ-UHFFFAOYSA-N
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
SMILES string
O=C1OC(=O)c2cc(ccc12)C(=O)c3ccc4C(=O)OC(=O)c4c3
vapor density
1.4 (vs air)
vapor pressure
<0.1 mmHg ( 0 °C)
assay
98%
form
powder
autoignition temp.
975 °F
expl. lim.
16 %
mp
218-222 °C (lit.)
Quality Level
Related Categories
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.
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
11 - Combustible Solids
wgk
WGK 1
ppe
dust mask type N95 (US), Eyeshields, Gloves
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Armarego WLF and Chai C
Purification of Laboratory Chemicals (2012)
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