C.I.Vat Blue 35 Chemical Properties

Melting point:

>300 °C

Boiling point:

492.0±45.0 °C(Predicted)

Density 

1.932±0.06 g/cm3(Predicted)

pka

-5.01±0.20(Predicted)

EPA Substance Registry System

3H-Indol-3-one, 5-bromo-2-(5-bromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- (84-40-2)

C.I.Vat Blue 35 Usage And Synthesis

Preparation

(a) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in sulfuric 1-Amino-4-bromo-9,10-dioxo-9,10-dihydroanthracene-2-sulfonic acid in two (FIAT 764 and 1313); (b) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in the boiling Nitrobenzene with Bromine bromination.

Properties and Applications

dark blue to navy blue. Aquamarine blue powder. Insoluble in Etanol. In concentrated sulfuric acid to blue light green, blue precipitation after dilution. Alkaline reduction leuco for yellow; Acid reduction leuco for pale yellow. The product of the cotton fiber to direct the gender is tall, good levelness. Used for cotton fabric direct printing, resist printing, prevent discharge and coloring discharge. Also can be used for silk and wool dyeing of wool directness high, good levelness.

C.I.Vat Blue 35(84-40-2)Related Product Information

• Vat Blue 42
• 7,7'-Dibromo-5,5'-dichloro-Δ2,2'(3H,3'H)-bi[1H-indole]-3,3'-dione
• Vat Blue 43
• Vat Blue 4
• 3H-Indol-3-one,5-dromo-2-1,3-dihydro-3-oxo-2H-indol-2-ylidene-1,2-dihydro
• 3H-Indol-3-one, 5,7-dichloro-2-(4-chloro-1-oxo-2(1H)-naphthalenylidene)-1,2-dihydro-4,6-dimethyl-
• 5,7-dichloro-2-(5,7-dichloro-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-3H-indol-3-one
• 5-Chloro-2-(5,7-dichloro-3-oxobenzo[b]thiophen-2(3H)-ylidene)-7-methoxy-4-methyl-1H-indol-3(2H)-one
• 4-(3-CARBAZOLYLAMINO)PHENOL