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[[Category:Triarylmethane dyes]] |
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[[Category:Salicylates]] |
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[[Category:Ammonium compounds]] |
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[[de:Aluminon]] |
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Revision as of 05:33, 5 March 2011
Names | |
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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
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.008.473 |
PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
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 otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Aluminon, the triammonium salt of aurintricarboxylic 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]
See also
References
- ^ Merck Index, 13th Ed.