Vat Brown 1

Preparation

1,4-Diaminoanthraquinone and 1-Bromoanthracene-9,10-dione or 1-Bromoanthracene-9,10-dione (2 Moore) condensation, its product in Pyridine with Aluminium chloride heating.

General Description

Fine, dark brown to black crystalline powder with a slight odor.

Air & Water Reactions

Insoluble in water.

Reactivity Profile

Oxidizing agents and reducing agents may destroy Vat Brown 1's color. .

Health Hazard

ACUTE/CHRONIC HAZARDS: When heated to decomposition Vat Brown 1 may emit toxic fumes of carbon oxides and nitrogen oxides.

Fire Hazard

Flash point data for Vat Brown 1 are not available; however, Vat Brown 1 is probably combustible. Dust clouds may form explosive mixtures with air.

Synthesis

1,1' : 4,1''-Trianthrimide-2,2' : 3,2''- carbazole, (Indanthren Brown BR, is prepared from 1,1' : 4,1''- trianthrimide in AlCl3 – pyridine .

Properties and Applications

red light brown. Dark brown powder. Slightly soluble in hot 1, 2, 3, 4 – Tetrahydronaphthalene and thermal Xylene, insoluble in cold Xylene. In concentrated sulfuric acid to Copenhagen green, dilution after brown precipitation. Alkaline reduction leuco for yellow brown; Acid reduction leuco for dark olive. Mainly used for cotton, hemp, silk and viscose dyeing and printing, cotton yarn dyeing common varieties. Used for polyester/cotton blended fabric two bath dyeing of polyester with little color. The leuco used for dyeing cotton knitwear.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	5	4-5	7	4-5	4-5	5	5
AATCC	5	5	8	4-5	4-5