5-[(2-Chloro-4-nitrophenyl)azo]-2-hydroxybenzoic acid sodium salt Chemical Properties,Usage,Production
Preparation
2-Chloro-4-nitrobenzenamine diazotization, and 2-Hydroxybenzoic acid?coupling.
Properties and Applications
red orange. Soluble in water and Etanol for yellow. In concentrated sulfuric acid for golden orange, dilution after light golden brown. Dye aqueous solution to join concentrated hydrochloric acid for green yellow; Join concentrated Sodium hydroxide solution for red wine.
![5-[(2-Chloro-4-nitrophenyl)azo]-2-hydroxybenzoic acid sodium salt Structure](https://www.chemicalbook.com/CAS/GIF/6408-37-3.gif)