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| CAS No.: | 652-03-9 |
|---|---|
| Name: | Tetrafluorophthalic acid |
| Molecular Structure: | |
|
|
|
| Formula: | C8H2F4O4 |
| Molecular Weight: | 238.095 |
| Synonyms: | Phthalicacid, tetrafluoro- (6CI,7CI,8CI);3,4,5,6-Tetrafluorophthalic acid; |
| EINECS: | 211-483-4 |
| Density: | 1.6239 (estimate) |
| Melting Point: | 162-164 °C |
| Boiling Point: | 345.7 °C at 760 mmHg |
| Flash Point: | 162.9 °C |
| Appearance: | White to light yellow crystal powder |
| Hazard Symbols: |
Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-37/39 |
| PSA: | 74.60000 |
| LogP: | 1.63940 |

N-methyl-tetrafluorophthalimide


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| With sulfuric acid; benzyltriethylammonium bromide at 45 - 50℃; for 15h; Temperature; | 95.7% |

octafluoro-1,3-dihydroisobenzofuran


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| With sulfuric acid for 3h; Heating; | 94% |


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| With sulfuric acid; cetyltrimethylammonim bromide at 110℃; for 8h; | 88.6% |
| With sulfuric acid In water | 67% |

perfluorobenzocyclobutenedione


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| Stage #1: perfluorobenzocyclobutenedione With bromine at 130℃; for 17.5h; Stage #2: With hydrogenchloride for 120h; Further stages.; | 86% |
| Stage #1: perfluorobenzocyclobutenedione With antimony pentafluoride at 130℃; for 4.5h; Stage #2: With hydrogenchloride Further stages.; | 70% |

perfluorobenzocyclobutene

A

perfluorobenzocyclobutenedione

B

3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| Stage #1: perfluorobenzocyclobutene With antimony pentafluoride; silica gel at 70℃; for 5h; Stage #2: With hydrogenchloride Further stages.; | A 86% B 7% |

perfluorobenzocyclobutene


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| With antimony pentafluoride; trifluoroacetic acid at 95℃; for 28h; | 85% |

| Conditions | Yield |
|---|---|
| In water | 82% |
| With hydrogenchloride In water |

hexachloro-phthalide


3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| With hydrogenchloride; potassium fluoride In tetrahydrofuran; sulfolane | 81% |

carbon monoxide


perfluorobenzocyclobutenone

A

3,4,5,6-tetrafluorophthalic acid

| Conditions | Yield |
|---|---|
| Stage #1: carbon monoxide; perfluorobenzocyclobutenone With antimony pentafluoride at 20℃; under 760.051 Torr; for 3h; Stage #2: With hydrogenchloride; water at 0℃; | A 10 %Spectr. B 67% |


| Conditions | Yield |
|---|---|
| With dihydrogen peroxide In acetonitrile at 60℃; for 6h; | 65% |
| With nitric acid |
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