Preparation
4-(Naphthalen-1-yldiazenyl)naphthalen-1-amine?and Naphthalen-1-amine heating, the main products are Rhodindine (a) and 6 to 8% of Magdala Red (b). With the boiling water extraction can be repeated segregation out, (b), add in melted content Naphthalene-1,4-diamine,
Properties and Applications
Pink , Slightly soluble in water for red, slightly soluble in alcohol for red, with fluorescent orange. In concentrated sulfuric acid for the gray light purple, after diluted purple precipitation. The dye solution to join strong sodium hydroxide solution have red light purple precipitation.
