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| CAS No.: | 19829-72-2 |
|---|---|
| Name: | 2,3-Dihydroxyterephthalic acid |
| Molecular Structure: | |
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| Formula: | C8H6O6 |
| Molecular Weight: | 198.132 |
| Synonyms: | 1,4-Benzenedicarboxylic acid,2,3-dihydroxy;2,3-dihydroxy-terephthalic acid;2,3-dihydroxy-1,4-benzenedicarboxylic acid;EINECS 243-354-3;1,4-Benzenedicarboxylic acid, 2,3-dihydroxy-;2,3-Dihydroxy-terephthalsaeure; |
| Density: | 1.779g/cm3 |
| Melting Point: | 309-310℃ (ethanol ethyl ether ) |
| Boiling Point: | 456.5°C at 760 mmHg |
| Flash Point: | 244°C |
| PSA: | 115.06000 |
| LogP: | 0.49420 |

| Conditions | Yield |
|---|---|
| Stage #1: carbon dioxide; benzene-1,2-diol With potassium carbonate at 230 - 250℃; under 19652.1 - 60507.9 Torr; for 19.25h; Stage #2: With hydrogenchloride In water for 5h; | 95% |
| With sodium hydroxide 1.) MeOH, r.t., 15 min, 2.) 1100 psi, 195-200 deg C, 90 h; | 56% |
| Stage #1: benzene-1,2-diol With sodium hydroxide Stage #2: carbon dioxide at 200℃; under 60800 Torr; for 48h; | 54% |

| Conditions | Yield |
|---|---|
| With 1,2,4-Trichlorobenzene at 225℃; for 14h; Autoclave; | 73% |

3,6-dicyanocatechol


2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| With sodium hydroxide |

2,3-dimethoxyterephthalic acid


2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| With hydrogen bromide |

| Conditions | Yield |
|---|---|
| at 225℃; |


| Conditions | Yield |
|---|---|
| at 200℃; im Rohr; |


benzene-1,2-diol


glycerol

A

2,3-Dihydroxybenzoic acid

B

2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| at 180℃; |


carbon dioxide


2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| unter hohem Druck und man erhitzt das gebildete Salz bei Gegenwart von CO2 im Autoklaven auf 210grad; |

benzene-1,2-diol


2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| at 200℃; im Einschlussrohr; |


2,3-dihydroxyterephthalic acid

| Conditions | Yield |
|---|---|
| With glycerol at 210℃; |