Aluminon
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Aluminon
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CAS No:
569-58-4
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Formula:
C22H14O9.3H3N
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Chemical Name:
Aluminon
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Synonyms:
Benzoic acid,3,3′-[(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methylene]bis[6-hydroxy-,ammonium salt (1:3);C.I. Mordant Violet 39,triammonium salt;Benzoic acid,5-[(3-carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-2-hydroxy-,triammonium salt;Aluminon;1,4-Cyclohexadiene-1-carboxylic acid,3-[bis(3-carboxy-4-hydroxyphenyl)methylene]-6-oxo-,triammonium salt;Ammonium aurintricarboxylate;Aurintricarboxylic acid ammonium salt;Aurintricarboxylic acid triammonium salt;Triammonium aurintricarboxylate;Triammonium dihydroxyfuchsonetricarboxylate;25329-64-0;144097-08-5;929976-57-8;956084-23-4
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CAS No:
Characteristics
179.15000
3.41770
Deep red powder
1.4414 (rough estimate)
220-225 °C (dec.)(lit.)
759.6ºC at 760mmHg
427.1ºC
H2O: 800 g/L (20 ºC)
Oral-rat LD50: 9000 mg/kg
Flammable; burning produces toxic ammonia and nitrogen oxide fumes
Safety Information
NONH for all modes of transport
2
36/38-36/37/38
26-36-37/39
GU4800000
Xi
Treasury is ventilated, low temperature and dry; stored separately from food materials
Stable.
P305 + P351 + P338
H315-H319
Aluminon Use and Manufacturing
In 20ml of concentrated sulfuric acid, 10g (0.145mol) solid sodium nitrite was added in portions, and the addition rate was controlled so that only a small amount of nitric oxide was released. When the dissolution is complete, add 20g (0.145mol) of salicylic acid in portions while stirring, the whole process takes about 15min. The mixture was then stirred at 20°C until all solids were dissolved, and the viscous liquid was bright red to brown. Put the liquid on an ice bath to reduce the temperature to 0°C. Slowly add 5ml (0.065mol) of 35-40% formaldehyde solution while stirring. The reaction temperature should not exceed 5°C. After the reaction is complete, add 100g of crushed ice With 500ml of ice water, stir until a small solid forms. Filter, wash with ice water several times, drain to dry, then dissolve in 1:2 (volume ratio) ammonia water, filter with filter paper. The filtrate was evaporated to dryness on a steam bath. Approximately 19.22g of brown-yellow glassy solid was obtained. The yield is 83-86%.
Forms brilliantly colored lakes with aluminum, chromium, iron, beryllium.Generally used for the detection and colorimetric estimation of aluminum in water, foods, tissues.Cf. Scherrer, Mogerman, J. Res. Natl. Bur. Stand. 21, 105 (1938).
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