ANTHRACENE BROWN Property

Melting point:

312-313°

Boiling point:

359.45°C (rough estimate)

Density 

1.3683 (rough estimate)

refractive index 

1.4825 (estimate)

storage temp. 

Hygroscopic, Refrigerator, under inert atmosphere

solubility 

DMSO (Slightly), Methanol (Slightly)

form 

Solid

pka

6.70±0.20(Predicted)

color 

Orange Red to Very Dark Orange

Merck 

14,683

CAS DataBase Reference

602-64-2

Safety

RTECS 

CB8198000

Hazard and Precautionary Statements (GHS)

ANTHRACENE BROWN Chemical Properties,Usage,Production

Chemical Properties

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

Uses

Anthragallol is the most active inhibitor against xanthine oxidase.

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.