Chemical Properties
deep purple to dark brown crystalline powder
Uses
The use of the inclusion complex of 1-amino-4-hydroxyanthraquinone (AHA) in the internal cavity of β-cyclodextrin confers increased sensitivity, selectivity and detection limit, and allows the determination of 10-70 ng ml-1 beryllium, compared to 60-500 ng ml-1 in the absence of the cyclodextrin.
Synthesis
1-Amino-4-hydroxyanthraquinone is prepared
from 1-amino-4-hydroxyanthraquinone-
3-sulfonic acid by splitting off the SO3H group
, from 1-benzoylamino-4-chloroanthraquinone
by treatment with boric–sulfuric acid,
or from 1-nitroanthraquinone by reduction with
FeCl2 in sulfuric acid and rearrangement of
the hydroxylamine stage , from 1,4-diaminoanthraquinone
with MnO2 in sulfuric acid
, or from 1-hydroxyanthraquinone by nitration
followed by reduction with Na2S
Properties and Applications
blue light pink to red blue light. Soluble in acetone, ethanol, benzene and linseed oil. The strong sulfuric acid to dark yellow, diluted for brown. Used in vinegar fiber, three vinegar, polyamide, polyester fiber, acrylic dyeing, also can be used for sheep and plastic color. Levelness and promote good rate.
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Standard
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Ironing Fastness
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Light Fastness
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Persperation Fastness
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Washing Fastness
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Fading
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Stain
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Fading
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Stain
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Fading
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Stain
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ISO
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4
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2
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5-6
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5
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5
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3-4
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4
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Purification Methods
Purify it by TLC on SiO2 gel plates (0.75mm thick) using toluene/acetone (9:1) as eluent. The main band is scraped off and extracted with MeOH. The solvent is evaporated, and the dye is dried in a drying pistol [Land et al. J Chem Soc, Faraday Trans 1 72 2091 1976]. It has also been recrystallised from aqueous EtOH. [Beilstein 14 H 268, 14 I 503, 14 II 168, 14 III 652, 14 IV 891.]
