ChemicalBook Product Catalog Dyes and Pigments dye Vat Dyes Vat Blue 4B

Vat Blue 4B

Vat Blue 4B Basic information
Product Name:Vat Blue 4B
Synonyms:BASF brilliant indigo;Vat blue 5 (C.I. 73065);Pigment organic indigo blue bromindigo EINecs;04BS;Arlanon Blue 2B;Bromo Indigo 2B;Convat Blue E;Kambanthrene bndigo 4B
CAS:2475-31-2
MF:C16H6Br4N2O2
MW:577.85
EINECS:219-598-1
Product Categories:
Mol File:2475-31-2.mol
Vat Blue 4B Structure
Vat Blue 4B Chemical Properties
Boiling point 563.4±50.0 °C(Predicted)
density 2.5583 (rough estimate)
refractive index 1.6300 (estimate)
Colour Index 73065
pka-7.15±0.20(Predicted)
CAS DataBase Reference2475-31-2(CAS DataBase Reference)
NIST Chemistry Referencec.i. Vat blue 5(2475-31-2)
EPA Substance Registry System3H-Indol-3-one, 5,7-dibromo-2-(5,7-dibromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- (2475-31-2)
Safety Information
RTECS NM3259100
MSDS Information
Vat Blue 4B Usage And Synthesis
UsesCiba Blue 2B (CAS# 2475-31-2) is a halogenated indigo dye and pollutant contributing 1,3,6,8-tetrabromocarbazole and some other halogenated carbazoles to the environment.
Preparation(a) and Acetic anhydride in the presence of Sodium acetate trihydrate in Acetic acid glacial will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro-? ?tetrabromide?(FIAT764); (b) in the boiling Nitrobenzene with Bromine will 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- four bromination, (C) 3H-indol-3-one,2-(1,3-dihydro-3-oxo-2H-indol-2-ylidene)-1,2-dihydro- in Chlorosulfonic acid (GP 225227) or in Sulfuryl chloride (GP 229304) and bromine reaction.
Properties and Applicationsblue. Dark blue powder. Etanol and insoluble in water, soluble in Xylene, Nitrobenzene and 1, 2, 3, 4 – Tetrahydronaphthalene. Alkaline reduction leuco for yellow; Acid reduction leuco for pale yellow. In concentrated sulfuric acid to blue light green, diluted into blue, and the emergence of precipitation. Used for cotton of jig dyeing and yarn dyeing, dyeing hair blue cloth color turquoise blue. Is the important dye printing, can direct printing, also can discharge printing and resist printing. Can also be used for viscose, silk and wool dyeing, levelness and affinity are good. Can be processed into organic pigment
Standard Ironing Fastness Chlorine bleach Light Fastness Mercerized Oxygen bleach Soaping
Fading Stain
ISO 5 2 4-5 4 3-4 4-5 5
AATCC 5 2 4-5 3-4 4
Vat Blue 4B Paste,Vat Blue 4B Paste Vat blue 6:1,Vat blue 6:1 Vat blue 5 solubilized (C.I. 73066),Vat blue 5 solubilized (C.I. 73066) 1-(2-amino-5-bromophenyl)ethanone 5-BROMO-1,2-DIHYDRO-INDOL-3-ONE Vat Blue 4B 2-BROMO-6-METHYLANILINE 2,4-Dibromo-6-methylaniline C.I. Reduced Vat Blue 43,C.I. Reduced Vat Blue 43 Solubilised Vat Blue IBC,C.L.Solubilised Vat Blue 6,C.I.Solubilised Vat Blue 6,Solubilised Vat Blue IBC,C.L.Solubilised Vat Blue 6,C.I.Solubilised Vat Blue 6 2,4-DIBROMO-N-METHYLANILINE, 97% 5-BROMOINDOLINE 2-AMINO-1-(3-BROMO-PHENYL)-ETHANONE 2-AMINO-3-BROMOBENZOPHENONE 3,5-Dibromoacetophenone VATBLUE 1H-INDOLE,7-BROMO-2,3-DIHYDRO- TRANS-1,2-DIBENZOYLETHYLENE
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