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Diphenic anhydride

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Diphenic anhydride Basic information

Product Name:
Diphenic anhydride
Synonyms:
  • 2,2'-Bibenzoic Anhydride 2,2'-Biphenyldicarboxylic Anhydride
  • Dibenzo[c,e]oxepine-5,7-dione
  • Diphenic anhydride 98%
  • dibenz[c,e]oxepin-5,7-dione
  • diphenic acid anhydride
  • O-DIPHENIC ANHYDRIDE
  • DIPHENIC ANHYDRIDE
  • biphenyl-2,2'-dicarboxylic anhydride
CAS:
6050-13-1
MF:
C14H8O3
MW:
224.21
EINECS:
227-950-0
Product Categories:
  • Biphenyl series
  • Biphenyl derivatives
  • Anhydride Monomers
  • Monomers
  • Polymer Science
Mol File:
6050-13-1.mol
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Diphenic anhydride Chemical Properties

Melting point:
225-227 °C (lit.)
Boiling point:
325.61°C (rough estimate)
Density 
1.2337 (rough estimate)
refractive index 
1.5400 (estimate)
storage temp. 
Inert atmosphere,Room Temperature
form 
Crystalline Powder or Flakes
color 
White to beige or grayish-brown
Water Solubility 
decomposes
Sensitive 
Moisture Sensitive
BRN 
171255
CAS DataBase Reference
6050-13-1(CAS DataBase Reference)
NIST Chemistry Reference
2,2'-Biphenyldicarboxylic anhydride(6050-13-1)
EPA Substance Registry System
Dibenz[c,e]oxepin-5,7-dione (6050-13-1)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38
Safety Statements 
26-37/39-7/8-24/25-37
WGK Germany 
3
TSCA 
Yes
HS Code 
29173990

MSDS

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Diphenic anhydride Usage And Synthesis

Chemical Properties

Powder

Purification Methods

After removing free acid by extraction with cold aqueous Na2CO3, the residue is crystallised from acetic anhydride and dried at 100o. Acetic anhydride converts the acid to the anhydride. It also crystallises from *C6H6 (m 219o) or chlorobenzene (m 224.5-225.5o). [Beilstein 17 H 526, 17 II 495, 17 III/IV 6425.]

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