4,4'-Difluorobenzophenone (Bis(4-fluorophenyl)methanone) is an organic compound with the formula of (FC6H4)2CO. This a colorless solid is commonly used as a precursor to PEEK, or polyetherether ketone, a so-called high performance polymer. Because PEEK is resistant to attack, it is commonly used in carbon fiber coatings and cable insulation.
4,4'-Difluorobenzophenone is prepared by the acylation of fluorobenzene with p-fluorobenzoyl chloride. The conversion is typically conducted in the presence of an aluminium chloride catalyst in a petroleum ether solvent. FC6H5C(O)Cl + C6H5F → (FC6H4)2CO + HCl
The polymer PEEK is generated from the reaction of 4,4'-difluorobenzophenone with the salts of 1,4-benzenediol. C6H4(ONa)2 + (FC6H4)2CO → 1/n[(C6H4O2)(C13H8O)]n + 2 NaF
Package & Transport
Package Size: 1000KG; 17 T
UN Number: 1082
Hazard Class: 2.1, 2.3
1. Store in a cool, well-ventilated area of low fire risk and out of direct sunlight.
2. Cylinders should be stored upright and firmly secured to prevent falling or being knocked over. Valve protection caps and valve cutlet threaded plugs must remain in place unless container is secured with valve outlet piped to use point. Do not drag, slide or roll cylinders.
3. Separate full containers from empty containers.
4. Avoid area where salt or other corrosive materials are present.
5.Avoid excessive inventory and storage time.
|Molecular formula||C13H8OF2 [(FC6H4)2CO]|
|Molar mass||218.2 g/mol|
|Jmol-3D images||Image 1|
|Odor||faint etheral odor|
|Density||1.54 g/cm3 at -60℃|
|Melting point||107.5 to 108.5℃
(380.6 to 381.6 K)
|Boiling point||137℃ (3 torr)|
|Vapour pressure||612 kPa at 25℃|
|Refractive index(nD)||1.38 (0℃)|
|Solubility in water||40.1 g/L|
|Solubility||soluble in benzene, chloroform|