Alizarine Yellow R

• 5 - [ (p- nitrophenyl) azo] salicylic acid
• Alizarin Yellow R
• Chrome Orange
• Mordant Orange 1
• C. I. 14030

• 2243-76-7
• 1718-34-9 (sodium salt)

Dark brown powder

Fixed

253.5 ° C

Soluble in water and ethanol

Attention

Template: Infobox chemical / molecular formula search available

Alizarin Yellow R, a yellow azo dye which can be prepared by the diazo coupling reaction of salicylic acid and diazotized 4 -nitroaniline.

In addition to methyl red, methyl orange and other azo dyes also alizarin yellow R is used as a color indicator at pH titrations. Starting from a low pH the color changes in the range of 10.1 to 12.0 from yellow to blue violet to.

Alizarin Yellow R does not count, despite its name to the Alizarinfarbstoffen or alizarin derivatives, which are derived from anthraquinone.