This scarlet red dye is an azo dye . It is known as 2-naphthol aniline (aniline yellow) I wonder where is yellow in it.Preparation video link in comments. : r/chemistry

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Preparation of 2-Naphthol Aniline Dye - CBSE Chemistry Practicals Class 12

Classifications, properties, recent synthesis and applications of azo dyes - ScienceDirect

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Chemistry Practical Class 12 Viva Questions on Preparation of 2-Naphthol Aniline Dye

Preparation of Phenyl azo-beta naphthol ( 2-naphthol aniline dye ) NCERT guide

How to Prepare 2-Naphthol Aniline Dye: Step-by-Step Guide

Chem 31.1 FR 2 - P a g e

Preparation of Phenyl azo-beta naphthol ( 2-naphthol aniline dye ) NCERT guide

The diazonium salt of which of the following compounds will form a coloured dye on reaction with β Naphthol in NaOH ?

The diazonium salt of which of the following compounds will form a coloured dye on reaction with β Naphthol in NaOH ?

Preparation of Phenyl azo-beta naphthol ( 2-naphthol aniline dye ) NCERT guide

Chem 31.1 FR 2 - P a g e