Fast Yellow AB

Fast Yellow AB is an azo dye. It used to be used as a food dye, designated in Europe by the E number E105. It is now delisted in both Europe and USA and is forbidden if used in foods and drinks, as toxicological data has shown it is harmful. E105 has been implicated in non-atopic asthma.[1]

Fast Yellow AB
Skeletal formula of Fast Yellow AB
Ball-and-stick model of the Fast Yellow AB molecule
Names
IUPAC name
2-amino-5-[(E)-(4-sulfophenyl)diazenyl]benzenesulfonic acid
Other names
Fast Yellow
Acid Yellow
Food Yellow 2
C.I. 13015
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.018.448
EC Number
  • 202-947-7
E number E105 (colours)
UNII
  • InChI=1S/C12H11N3O6S2/c13-11-6-3-9(7-12(11)23(19,20)21)15-14-8-1-4-10(5-2-8)22(16,17)18/h1-7H,13H2,(H,16,17,18)(H,19,20,21)
    Key: DCYBHNIOTZBCFS-UHFFFAOYSA-N
  • Nc1ccc(cc1OS(O)=O)/N=N/c2ccc(OS(O)=O)cc2
Properties
C12H11N3O6S2
Molar mass 357.36 g·mol−1
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

References
  1. STATEMENT OF HAZARDOUS NATURE. Synonyms: ...Fast Yellow AB... pdf
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