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| Names | |
|---|---|
| IUPAC name
1-(2,5-Dimethoxy-phenylazo)-naphthalen-2-ol | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider |
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| ECHA InfoCard | 100.026.162 
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| E number | E121 (colours) |
| KEGG |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C18H16N2O3 | |
| Molar mass | 308.337 g·mol−1 |
| Appearance | Orange to yellow solid or a dark red powder |
| Melting point | 156 °C (313 °F; 429 K) |
| Insoluble | |
| Hazards | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Citrus Red 2, Citrus Red No. 2, C.I. Solvent Red 80, or C.I. 12156 is an artificial dye. As a food dye, it has been permitted by the US Food and Drug Administration (FDA) since 1956 to color the skin of oranges.[1][2][3] Citrus Red 2 is listed by the International Agency for Research on Cancer (IARC) as a group 2B carcinogen, a substance "possibly carcinogenic to humans".[4]
Citrus Red 2 is an orange to yellow solid or a dark red powder with a melting point of 156 °C. It is not soluble in water, but is readily soluble in many organic solvents.
In the United States, Citrus Red 2 is sometimes used to color oranges. It is only permitted to be used on the peel.[1] It is permitted when the fruit is intended to be eaten, but is not permitted when the fruit is intended or used for processing, for example to manufacture orange juice.[2] It is used on some oranges from the US state of Florida but is banned in the US states of California and Arizona.[citation needed]
