This scarlet red dye is an azo dye . It is known as 2-naphthol

Reduction of four bis‐azo dyes by pig liver microsomal fraction in anaerobic conditions - Faraoni - 2023 - CLEAN – Soil, Air, Water - Wiley Online Library

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4 Synthesis of an Azo Dye: Orange II OH SO3H SO3H

Raman spectra of the naphthol reds analyzed in the prints. A Raman

Azo dye - Wikipedia

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

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Naphthol Dyes and Dyeing Process, Stripping and Fastness Properties