Chrysoine resorcinol
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Skeletal formula of chrysoine resorcinol as a sodium salt | |
Space-filling model of chrysoine resorcinol as a sodium salt | |
Names | |
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IUPAC name
Sodium 4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulfonate
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Other names
Sodium p-(2,4-dihydroxyphenylazo)benzenesulfonate; Chrysoine; Resorcinol Yellow; Gold Yellow; Yellow T; Tropaeolin O; Tropaeolin R; C.I. Food Yellow 8; C.I. Acid Orange 6; C.I. 14270
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Identifiers | |
547-57-9 | |
ChemSpider | 21106427 |
EC Number | 208-924-8 |
Jmol 3D model | Interactive image Interactive image |
PubChem | 6093186 |
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Properties | |
C12H9N2NaO5S | |
Molar mass | 316.26 g·mol−1 |
Appearance | Orange-yellow solid |
Partially soluble | |
Vapor pressure | {{{value}}} |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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verify (what is ?) | |
Infobox references | |
Chrysoine resorcinol is a synthetic azo dye which was formerly used as a food additive.[citation needed] In Europe, it was banned as a food additive in 1977.[1] In the US, it was banned in 1988.[citation needed]
Chrysoine resorcinol can be used as a pH indicator with a color change between pH 11 and pH 12.7. In colorimetry, it has an absorption maximum of 387 nm.
Chrysoine resorcinol (pH indicator) | ||
below pH 11.0 | above pH 12.7 | |
11.0 | ⇌ | 12.7 |
Notes
External links
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- PH indicators
- Food colorings
- Azo dyes
- Benzenesulfonates
- Sodium compounds
- Resorcinols
- Anilines
- Organic compound stubs