Orange GGN
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| Orange GGN | |
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| Other names | 1-(m-sulfophenylazo)-2-naphthol-6-sulfonic acid, disodium salt |
| Identifiers | |
| CAS number | [523-44-4] |
| SMILES | OC1=C(N=NC3=CC=CC(S(=O) (O)=O)=C3)C(C=CC(S(=O) (O)=O)=C2)=C2C=C1 |
| Properties | |
| Molecular formula | C16H10N2Na2O7S2 (disodium salt) |
| Molar mass | 452.369 g/mol |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Orange GGN, also known as alpha-naphthol orange, is a food dye. In Europe it is denoted by the E Number E111. It is the disodium salt of 1-(m-sulfophenylazo)-2-naphthol-6-sulfonic acid. It is currently delisted in Europe and USA, as toxicological data shown it is harmful.
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.
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