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Names | |
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IUPAC name
Tetrasodium 6-amino-4-hydroxy-3-[[7-sulfonato-4-[(4-sulfonatophenyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulfonate
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Other names
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Identifiers | |
3D model (JSmol)
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ECHA InfoCard | 100.016.661 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
C26H15N5Na4O13S4 | |
Molar mass | 825.63 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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Black 7984, Food Black 2, or C.I. 27755, is a brown-to-black synthetic diazo dye. It is often used as the tetrasodium salt.
When used as a food dye, it has E number E152. Its use in food has not been permitted in the United States and in the European Union since 1984.[citation needed] It is also not permitted in Australia and Japan.[citation needed]
Black 7984 is also used in cosmetics.