116-85-8

deep purple to dark brown crystalline powder

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.

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

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.

Standard	Ironing Fastness		Light Fastness	Persperation Fastness		Washing Fastness
	Fading	Stain		Fading	Stain	Fading	Stain
ISO	4	2	5-6	5	5	3-4	4

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.]