Aluminon
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| Aluminon | |
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| Other names | ammonium aurin-tricarboxylate; 5-[(3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-ylidene)methyl]-2-hydroxybenzoic acid triammonium salt |
| Identifiers | |
| CAS number | [] |
| PubChem | |
| Properties | |
| Molecular formula | C22H23N3O9 |
| Molar mass | 473.43 g/mol |
| Appearance | yellow-brown crystals, red in aqueous solution |
| Solubility in other solvents | freely soluble in H2O |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
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Aluminon, the triammonium salt of aurin tricarboxylic acid, is a dye commonly used to detect the presence of the aluminium ion in an aqueous solution. In addition to its use in qualitative inorganic analysis, aluminon has applications in pharyngeal aerosols. It forms brilliantly colored lake pigments with aluminum, chromium, iron, and beryllium.
Aluminon is prepared by reacting sodium nitrite with salicylic acid, adding formaldehyde, then treating with ammonia.[1]
[edit] See also
[edit] References
- ^ Merck Index 13th Ed.
