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2-Ethoxynaphthalene is an alkyl ether of 2-naphthol, which is generally used as a perfume and flavoring compound.
E 4163 (OTTO) 2-Ethoxynaphthalene, ≥99% Cas 93-18-5 - used to increased concentration methyl benzoate enhances the fluorescence by increasing the polarity of the solvent .