3-Hydroxy-4-[(2-methylphenyl)azo]naphthalene-2,7-disulfonic acid disodium salt Chemical Properties,Usage,Production
Preparation
O-Methylaniline diazo, coupled with 3-Hydroxynaphthalene-2,7-disulfonic acid.
Properties and Applications
yellow light red. Soluble in water, slightly soluble in ethanol for orange red. The strong sulfuric acid explicit orange red, orange is still the diluted. In water solution to join strong hydrochloric acid for orange red; Add sodium hydroxide for orange brown.
![3-Hydroxy-4-[(2-methylphenyl)azo]naphthalene-2,7-disulfonic acid disodium salt Structure](https://www.chemicalbook.com/CAS/GIF/5858-30-0.gif)