| Identification | ||
| Name | 3,4-Dihydroxybenzoic acid | |
| Synonyms | Protocatechuic acid | |
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| Molecular Structure |
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| Molecular Formula | C7H6O4 | |
| Molecular Weight | 154.12 | |
| CAS Registry Number | 99-50-3 | |
| EINECS | 202-760-0 | |
| Properties | ||
| Melting point | 198-202 ºC | |