Alizarine Yellow R
Names | |
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Other names
5-[(p-nitrophenyl)azo]salicylic acid sodium salt
Chrome orange Mordant orange 1 C.I. 14030 | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.017.109 |
CompTox Dashboard (EPA)
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Properties | |
C13H8N3NaO5 (Na salt) C13H9N3O5 (acid) | |
Molar mass | 309.21 g mol−1 (Na salt) 287.23 g mol−1 (acid) |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Harmful |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Alizarine Yellow R 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.[2] Its main use is as a pH indicator.
Alizarine Yellow R (pH indicator) | ||
below pH 10.1 | above pH 12.0 | |
10.1 | ⇌ | 12.0 |
References
- ^ Lide, David R. (2008). CRC Handbook of Chemistry and Physics (89th ed.). CRC Press. pp. 3–10. ISBN 978-0-8493-0488-0.
- ^ http://msds.chem.ox.ac.uk/AL/alizarin_yellow_R.html