Gentisic acid
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| Gentisic acid | |
|---|---|
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| IUPAC name | 2,5-dihydroxybenzoic acid |
| Other names | 5-Hydroxysalicylic acid; Gentianic acid; Carboxyhydroquinone; 2,5-Dioxybenzoic Acid; Hydroquinonecarboxylic Acid |
| Identifiers | |
| CAS number | [490-79-9] |
| PubChem | |
| SMILES | C1=CC(=C(C=C1O)C(=O)O)O |
| Properties | |
| Molecular formula | C7H6O4 |
| Molar mass | 154.12 |
| Appearance | white to yellow powder |
| Melting point |
200 - 205 C (Sublimes) |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Gentisic acid is an aromatic carboxylic acid used as a sample matrix in Matrix-assisted laser desorption/ionization Mass spectrometry.
As a hydroquinone, it is readily oxidised and is used as an antioxidant excipient in some pharmaceutical preparations.
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