Alizarine Yellow R
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| Alizarine Yellow R | |
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| Identifiers | |
| CAS number | [1783-34-9] [2243-76-7] |
| SMILES | O=C([O-])c1cc(ccc1O)/N=N/ c2ccc(cc2)[N+]([O-])=O |
| Properties | |
| Molecular formula | C13H8N3NaO5 |
| Molar mass | 309.21 g mol−1 |
| 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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| Alizarine Yellow R (pH indicator) | ||
| below pH 10.1 | above pH 12.0 | |
| 10.1 | ↔ | 12.0 |
Alizarine Yellow R (Chrome Orange, Mordant Orange 1) is a yellow colored azo dye made by the diazo coupling reaction. It usually comes as a sodium salt. In its pure form it is a rust-colored solid. It is a pH indicator.
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