Patent Blue V

"E131" redirects here. For the Japanese train type, see E131 series.
Patent Blue V
Chemical structure
Crystals
Names
Other names
  • Food Blue 5
  • Sulphan Blue
  • Acid Blue 3
  • L-Blau 3
  • C-Blau 20
  • Patentblau V
  • Sky Blue
  • C.I. 42051
  • E 131
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.020.522 Edit this at Wikidata
EC Number
  • 243-654-4
  • Calcium salt: 222-573-8
E number E131 (colours)
KEGG
UNII
  • InChI=1S/C27H32N2O7S2/c1-5-28(6-2)21-13-9-19(10-14-21)27(20-11-15-22(16-12-20)29(7-3)8-4)23-17-24(30)26(38(34,35)36)18-25(23)37(31,32)33/h9-18H,5-8H2,1-4H3,(H2-,30,31,32,33,34,35,36)/p+1
    Key: DHAHKSQXIXFZJB-UHFFFAOYSA-O
  • InChI=1/C27H32N2O7S2/c1-5-28(6-2)21-13-9-19(10-14-21)27(20-11-15-22(16-12-20)29(7-3)8-4)23-17-24(30)26(38(34,35)36)18-25(23)37(31,32)33/h9-18H,5-8H2,1-4H3,(H2-,30,31,32,33,34,35,36)/p+1
    Key: DHAHKSQXIXFZJB-IKLDFBCSAW
  • CCN(CC)c1ccc(cc1)C(=C2C=CC(=[N+](CC)CC)C=C2)c3cc(c(cc3S(=O)(=O)O)S(=O)(=O)O)O
Pharmacology
V04CX09 (WHO)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Patent Blue V, also called Food Blue 5, Sulphan Blue, Acid Blue 3, L-Blau 3, C-Blau 20, Patentblau V, Sky Blue, or C.I. 42051, is a sky blue synthetic triphenylmethane dye used as a food coloring.[1] As a food additive, it has E number E131. It is a sodium or calcium salt of [4-(α-(4-diethylaminophenyl)-5-hydroxy- 2,4-disulfophenylmethylidene)-2,5-cyclohexadien-1-ylidene] diethylammonium hydroxide inner salt.

  1. ^ Gessner, Thomas; Mayer, Udo (2000). "Triarylmethane and Diarylmethane Dyes". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_179. ISBN 978-3527306732.