Alizarine Yellow R

Alizarine Yellow R
Space-filling model of Alizarine Yellow R as a sodium salt
Names
Other names
5-[(p-nitrophenyl)azo]salicylic acid sodium salt
Chrome orange
Mordant orange 1
C.I. 14030
Identifiers
1718-34-9 (Na salt) N
2243-76-7 (acid)[1] N
ChemSpider 17215762 YesY
Jmol interactive 3D Image
Properties
C13H8N3NaO5 (Na salt)
C13H9N3O5 (acid)
Molar mass 309.21 g mol−1 (Na salt)
287.23 g mol−1 (acid)
Hazards
Main hazards Harmful
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

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

  1. Lide, David R. (2008). CRC Handbook of Chemistry and Physics (89th ed.). CRC Press. pp. 3–10. ISBN 978-0-8493-0488-0.
  2. http://msds.chem.ox.ac.uk/AL/alizarin_yellow_R.html


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