Vat Blue 4 Chemical Properties

Melting point:

470-500°C

Boiling point:

553.06°C (rough estimate)

Density 

1.3228 (rough estimate)

refractive index 

1.5800 (estimate)

storage temp. 

Sealed in dry,Room Temperature

form 

powder to crystal

pka

-1.40±0.20(Predicted)

Colour Index 

69800

color 

Dark red to Dark purple to Dark blue

Water Solubility 

<0.1 g/100 mL at 21 ºC

Merck 

14,4934

Stability:

Incompatible with strong oxidizing agents.

LogP

1.78 at 20℃

EPA Substance Registry System

C.I. Pigment Blue 60 (81-77-6)

Safety Information

Risk Statements 

20/21/22

Safety Statements 

22-36/37/39

RTECS 

CB8761100

HS Code 

3204.15.8000

Hazardous Substances Data

81-77-6(Hazardous Substances Data)

Toxicity

LD50 oral in rat: 2gm/kg

MSDS

• Language:English Provider:Vat Blue 4

Vat Blue 4 Usage And Synthesis

Chemical Properties

blue needles with a metallic lustre

Uses

Dinaphtho[2,3-a:2'',3''-h]phenazine-5,9,14,18(6H,15H)-tetraone is a pigment; used in preparation of Polyethylene composite material for outdoor building materials.

Uses

Mainly to dye cotton.

Uses

Indanthrone (Pigment Blue 60) functions as a blue pigment or as a dye.

Definition

A blue vat dye or pigment. The molecule consists of two anthraquinone nuclei linked through two –NH groups.

Preparation

(a) in potassium nitrate, LvSuanJia, glucose or organic acid salt (such as formic acid potassium or acetic acid potassium or the mixture of both) under the existence of, with potassium hydroxide treatment 2-Aminoanthracene-9,10-dione;

Reactions

As a pigment, indanthrone is a particulate, insoluble solid dispersed directly into a vehicle, whereas as a dye it is reduced to a base-soluble hydroquinone derivative and then reoxidized onto a solid substrate.

General Description

Blue needles with a metallic luster or fine fluffy deep blue powder.

Air & Water Reactions

Insoluble in water.

Fire Hazard

Flash point data for Vat Blue 4 are not available. Vat Blue 4 is probably combustible.

Flammability and Explosibility

Not classified

Synthesis

Indanthrone , Indanthren Blue RS and R, is prepared from 2- (or 1-) aminoanthraquinone by potash fusion , in potassium phenolate , , or in 50 % potassium hydroxide , .
Chlorination of indanthrone in sulfuric acid under addition of 1 % or5%manganese dioxide (5 – 8 % or 13.8 – 14 % Cl) at 50 – 55 ?C affords dyes of slightly greener shades (Indanthren Blue GCD or BC).

Purification Methods

Crystallise indanthrene repeatedly from 1,2,4-trichlorobenzene to give a blue powder. It is soluble in alkali and conc H2SO4. [Weinstein & Merritt J Am Chem Soc 81 3759 1959, Beilstein 24 II 317, 24 III/IV 2193.]

Properties and Applications

red light blue. Slightly soluble in chloroform (heat), o-chlorophenol,Quinoline, insoluble in acetic acid, acetone, ethanol, pyridine, toluene, xylene. The strong sulfuric acid for brown, after diluted blue precipitation; In alkaline insurance powder solution for blue, acidic solutions for the red light in blue. And C.I. Vat ?Blue 4, C.I. Pigment Blue 60 the same chemical structure.

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