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Postion:Product Catalog >Dyes and Pigments>dye>Vat Dyes>Vat Blue 4B
Vat Blue 4B
  • Vat Blue 4B
  • Vat Blue 4B
  • Vat Blue 4B
  • Vat Blue 4B
  • Vat Blue 4B

Vat Blue 4B NEW

Price Get Latest Price
Package 25KG
Min. Order: 1KG
Supply Ability: 50000KG/month
Update Time: 2023-10-10

Product Details

Product Name: Vat Blue 4B CAS No.: 2475-31-2
EC-No.: 219-598-1 Min. Order: 1KG
Purity: 99% Supply Ability: 50000KG/month
Release date: 2023/10/10

CAS:2475-31-2
MF:C16H6Br4N2O2
MW:577.85
EINECS:219-598-1
Product Categories:
Mol File:2475-31-2.mol
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Vat Blue 4B Chemical Properties
Boiling point 563.4±50.0 °C(Predicted)
density 2.5583 (rough estimate)
refractive index 1.6300 (estimate)
pka-7.15±0.20(Predicted)
Colour Index 73065
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)
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

Packing &shipping&Payment

Packing:25kg/drum
Shipping:by sea or by air
Payment:T/T,western union,moneygram
Packaging Details drum
Port:Tianjin
Lead Time :
Quantity(Kilograms)1 - 10000>10000
Est. Time(days)5To be negotiated

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Article illustrationCompany information
Hebei Mojin Biotechnology Co., Ltd, Our company is a professional in 4'-Methylacetophenone,Levamisole hydrochloride ,N-Methylformamide and other chemical reagents research and development production enterprises. Our business covers more than 30 countries, most of the big customers come from Europe, America and other countries in the world, we can guarantee the quality and price. In recent decades, with the efforts of all employees, we have established many cooperative companies in shandong, henan, guangdong and other places. Our corporate purpose is based on the market, enhance the strength, take the road of scientific and environmental sustainable development, relying on the country. Technology r & d center, increase the investment in r & d, based on the domestic market, expand the international market, manufacturing quality products, sincere service to the society, into a modern, ecological, scientific and technological enterprise world.

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