ANTHRACENE BROWN

Chemical properties

Brown powder. Soluble in alcohol, ether, and glacial acetic acid; slightly soluble in water and chloroform. Sublimes at 290C.

The Uses of ANTHRACENE BROWN

Anthragallol is the most active inhibitor against xanthine oxidase.

What are the applications of Application

Anthracene brown is an anthracene compound

Definition

ChEBI: A trihydroxyanthraquinone that is anthracene-9,10-dione substituted by hydroxy groups at positions 1, 2 and 3.

Preparation

Commonly known as ?Anthragallol. (A)3,4,5-Trihydroxybenzoic acid and Benzoic acid and sulfuric acid heated; (b) in the presence of zinc chloride, heating gallic acid and Phthalic anhydride; (c) 2-Hydroxy-1,3-dinitroanthraquinone?reduction in strong alkaline solution; (d)1,3-Diamino-2-hydroxyanthracene-9,10-dione and hydrochloric acid heated under pressure. Note: The product is a free acid state paste; powdery product is sodium

Properties and Applications

Dark brown (chrome). (Sodium salt) was dissolved in water, slightly soluble in o-chlorophenol, (free acid) is insoluble in water, salt is not soluble in acetone, ethanol, benzene, carbon tetrachloride, cellosolve, chloroform, pyridine, toluene. The free acid in concentrated sulfuric acid is brown-red, sodium salt as a brown; diluted brown flocculent precipitate the free acid, sodium salt as an amber.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	5	5-6	3-4	2-3	5	5	5
AATCC	Dry 3,wet 5	5	2-3		5	4	5