Orange GGN

Orange GGN, also known as alpha-naphthol orange, is an azo dye[1] formerly used as a food dye. It is the disodium salt of 1-(m-sulfophenylazo)-2-naphthol-6-sulfonic acid. In Europe, it was denoted by the E Number E111, but has been forbidden for use in foods since 1 January 1978.[2] It has never been included in the food additives list of the Codex Alimentarius. As such, it is forbidden for food use in general, because toxicological data has shown it is harmful.

Orange GGN
Names
Other names
1-(m-Sulfophenylazo)-2-naphthol-6-sulfonic acid, disodium salt
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.017.340
E number E111 (colours)
UNII
  • InChI=1S/C16H12N2O7S2.2Na/c19-15-7-4-10-8-13(27(23,24)25)5-6-14(10)16(15)18-17-11-2-1-3-12(9-11)26(20,21)22;;/h1-9,19H,(H,20,21,22)(H,23,24,25);;/q;2*+1/p-2/b18-17+;; checkY
    Key: CECHAJXICNIUQL-QIKYXUGXSA-L checkY
  • InChI=1/C16H12N2O7S2.2Na/c19-15-7-4-10-8-13(27(23,24)25)5-6-14(10)16(15)18-17-11-2-1-3-12(9-11)26(20,21)22;;/h1-9,19H,(H,20,21,22)(H,23,24,25);;/q;2*+1/p-2/b18-17+;;
    Key: CECHAJXICNIUQL-JLAJEUQUBK
  • [Na+].[Na+].[O-]S(=O)(=O)c1cccc(c1)/N=N/c2c3ccc(cc3ccc2O)S([O-])(=O)=O
Properties
C16H10N2Na2O7S2
Molar mass 452.36 g·mol−1
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

The absorption spectrum of Orange GGN and Sunset Yellow is nearly identical in visible and ultraviolet range, but they can be distinguished by their IR spectra.

References
  1. "Orange GGN".
  2. EU directive 76/399/EEC
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