Vat Brown 1 Chemical Properties

Boiling point:

675.58°C (rough estimate)

Density 

1.2856 (rough estimate)

refractive index 

1.4670 (estimate)

pka

11.33±0.20(Predicted)

LogP

8.52

CAS DataBase Reference

2475-33-4(CAS DataBase Reference)

EPA Substance Registry System

C.I. Vat Brown 1 (2475-33-4)

Vat Brown 1 Usage And Synthesis

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.

Vat Brown 1(2475-33-4)Related Product Information

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