5,5 ', 7,7'-tetrabromoindigo

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Structural formula
Structure of tetrabromo indigo
General
Surname 5,5 ', 7,7'-tetrabromoindigo
other names
  • (2 E ) -5,7-dibromo-2- (5,7-dibromo-3-oxo-1 H -indol-2-ylidene) -1 H -indole-3-one
  • CI Vat blue 5
  • CI 73065
  • Vat Blue 4B
  • Ciba blue 2B
Molecular formula C 16 H 6 Br 4 N 2 O 2
Brief description

Dark blue powder

External identifiers / databases
CAS number 2475-31-2
EC number 219-598-1
ECHA InfoCard 100.017.817
PubChem 5285390
ChemSpider 4448203
Wikidata Q16830254
properties
Molar mass 577.85 g mol −1
Physical state

Firmly

density

2.313 g cm −3

solubility
  • almost insoluble in water, alcohols and acetone
  • Soluble in xylene, carbon tetrachloride, aniline, 1,2,3,4-tetrahydronaphthalene and nitrobenzene
safety instructions
GHS hazard labeling
no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

5,5 ', 7,7'-tetrabromoindigo is a chemical compound of indigo dyes .

Presentation and extraction

5,5 ', 7,7'-Tetrabromoindigo can be prepared as reaction medium by bromination of indigo in thionyl chloride , nitrobenzene or glacial acetic acid .

Individual evidence

  1. ^ A b Klaus Hunger: Industrial Dyes: Chemistry, Properties, Applications . Wiley-VCH Verlag GmbH & Co. KGaA; 1st edition 2002; ISBN 3-527-30426-6 , page 213.
  2. ↑ Wolfgang Kerber (editor), Wolfgang Reiter (editor) and Rudolf Werner Soukup (editor): The scientific world of yesterday . Böhlau Vienna; 1st edition 2004; ISBN 978-3205773030 ; Page 139.
  3. ↑ a b Entry on 5,5 ′, 7,7′-tetrabromoindigo. In: Römpp Online . Georg Thieme Verlag, accessed on December 4, 2014.
  4. ↑ American Chemicals: 3H-Indol-3-one, 5,7-dibromo-2- (5,7-dibromo-1,3-dihydro-3-oxo-2H-indol-2-ylidene) -1,2- dihydro- ( Memento of December 10, 2014 in the Internet Archive ), accessed on December 4, 2014.
  5. ↑ a b Grandmougin, E .: On the knowledge of 5.7.5'.7'-tetrabromo-indigo in Chem. Ber. 42 (1909) 4408-4411, doi : 10.1002 / cber.19090420433 .
  6. ↑ a b World Dye Varity: Vat Blue 5 , accessed December 4, 2014.
  7. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
  8. ↑ Process for the production of halogenated indigo - Document DE4110458A1. In: patent-de.com. March 30, 1991, accessed December 28, 2014 .
  9. ↑ Steingruber, E .: Indigo and Indigo Colorants in Ullmann's Encyclopedia of Technical Chemistry, 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, doi : 10.1002 / 14356007.a14_149.pub2 .

Web links

  • World dye variety: Vat Blue 5 , accessed December 4, 2014