Alizarine Yellow R Explained

Alizarine Yellow R is a yellow colored azo dye made by the diazo coupling reaction. It is usually commercially available as a sodium salt. In its pure form, it is a rust-colored solid.^[1] It is mainly used as a pH indicator.

Preparation

Alizarine Yellow R is produced by azo coupling of salicylic acid and diazonium derivative of 4-Nitroaniline

External links

• Alizarin Yellow R at Sigma Aldrich

Notes and References

1. Web site: Safety Datasheet (MSDS) for alizarin yellow R. dead. https://web.archive.org/web/20110319233005/http://msds.chem.ox.ac.uk/AL/alizarin_yellow_R.html. 2005. 11 October 2008. 19 March 2011. Department of Chemistry, University of Oxford.