4,4'-Oxydiphthalic anhydride
Synonym(s):3,3′,4,4′-Diphenyl ether tetracarboxylic acid dianhydride;3,3′,4,4′-Diphenyl ether tetracarboxylic dianhydride;3,3′,4,4′-Diphenyl oxide tetracarboxylic dianhydride;5,5′-Oxybis[1,3-isobenzofurandione]
- CAS NO.：1823-59-2
- Empirical Formula: C16H6O7
- Molecular Weight: 310.21
- MDL number: MFCD00039144
- EINECS: 412-830-4
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 03:24:02
What is 4,4'-Oxydiphthalic anhydride?
Chemical properties
off-white to white powder
The Uses of 4,4'-Oxydiphthalic anhydride
4,4'-oxydiphthalic anhydride be used for the preparation of a polyimide material.
Preparation
The preparation of 4,4'-Oxydiphthalic anhydride is as follows:Chlorophthalic anhydride (30g, 160mmol), tetraphenyl phosphonium bromide (0.3g, 0.7mmol), and 2,5-dichlorobenzoic acid (0.08g, 0.4mmol) were heated to approximately 220℃. Potassium carbonate (7.95g, 58mmol) was added over 45 minutes. The reaction was sampled after addition of the potassium carbonate and showed a 24.9% conversion to 4,4'-oxydiphthalic anhydride. The reaction was heated for an additional 45 minutes. The reaction mixture was diluted with 1,2,4-trichlorobenzene (90g) and filtered. The 4,4'-oxydiphthalic anhydride was allowed to crystallize and was collected, washed with 1,2,4-trichlorobenzene followed by hexane, and dried in an air circulating oven at 120℃. to give crude 4,4'-oxydiphthalic anhydride, 12.9g.
Flammability and Explosibility
Not classified
Properties of 4,4'-Oxydiphthalic anhydride
| Melting point: | 225-229 °C(lit.) |
| Boiling point: | 410.39°C (rough estimate) |
| Density | 1.4942 (rough estimate) |
| refractive index | 1.6380 (estimate) |
| storage temp. | Inert atmosphere,Room Temperature |
| solubility | very slightly in Toluene,Acetone |
| form | powder to crystal |
| color | White to Light yellow to Light orange |
| CAS DataBase Reference | 1823-59-2(CAS DataBase Reference) |
| NIST Chemistry Reference | Bis-(3-phthalyl anhydride) ether(1823-59-2) |
| EPA Substance Registry System | 1,3-Isobenzofurandione, 5,5'-oxybis- (1823-59-2) |
Safety information for 4,4'-Oxydiphthalic anhydride
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05 |
| GHS Hazard Statements |
H412:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. |
Computed Descriptors for 4,4'-Oxydiphthalic anhydride
| InChIKey | QQGYZOYWNCKGEK-UHFFFAOYSA-N |
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