4-Hydroxy-3-(1-naphthalenylazo)-2,7-naphthalenedisulfonic acid disodium salt Chemical Properties,Usage,Production
Preparation
Naphthalen-1-amine diazo, coupled with 4-Hydroxynaphthalene-2,7-disulfonic acid.
Properties and Applications
blu-ray red. For product red is soluble in water, soluble in ethanol in red. The strong sulfuric acid for blue, purple for red after diluted. In aqueous solution to join strong hydrochloric acid wine red precipitate; Add sodium hydroxide into orange brown.
