2-Hydroxy-5-[(4,8-disulfo-2-naphtyl)azo]benzoic acid trisodium salt Chemical Properties,Usage,Production
Preparation
3-Aminonaphthalene-1,5-disulfonic acid diazotization, and 2-Hydroxybenzoic acid?coupling.
Properties and Applications
red light yellow. Soluble in water for yellow, not soluble in organic solvent. In concentrated sulfuric acid for yellow orange; In concentrated hydrochloric acid for yellow orange.
![2-Hydroxy-5-[(4,8-disulfo-2-naphtyl)azo]benzoic acid trisodium salt Structure](https://www.chemicalbook.com/CAS/GIF/6471-08-5.gif)