We manufacture Industrial Naphthol ASBS Dyes by reacting napthalene with sulphuric acid and hydrolyzing the sulphate ester by heating with sodium hydroxide solution. This  is used in chemical analysis to detect the ferric ion.

Industrial Naphthol ASBS Dyes

Naphthol AS-BS CAS No. 135-65-9 Molecular formula : C17H12N2O4 purposes : mainly used for cotton fabric dyeing and printing of bottoming agent, general and naphthol AS and others with markedly red, red rose color.