Naphthoresorcinol (1,3-Dihydroxynaphthalene) is a fluorescent dye (λ_ex=330 nm, λ_em=380 nm) that can react with the NPPD (a tracer) and concentrated HCl and develop a red color. Naphthoresorcinol could be used as a background electrolyte (BGE) to determine the carbohydrates^{[1] [2] [3]} .

160.17

C??H?O?

132-86-5

1,3-二羟基萘；1,3-萘二酚；萘间二酚；间二萘酚；间萘二酚

OC1=C2C=CC=CC2=CC(O)=C1

Room temperature in continental US; may vary elsewhere.

• [1]. Vyas S, et, al. Fluorescence and light scattering studies on the interaction of 1,3-dihydroxynaphthalene with ionic and non-ionic surfactants. Polymer Photochemistry. 1984; 4(4):245-253.

  [2]. Suzuki S, et, al. Development of a field kit for use by non-scientists for chemical tracking using 5-(4-nitrophenyl)-2,4-pentadien-1-al. Forensic Sci Int. 2013 May 10;228(1-3):e25-7.

  [3]. Lee YH, et, al. Determination of carbohydrates by high-performance capillary electrophoresis with indirect absorbance detection. J Chromatogr B Biomed Appl. 1996 May 31;681(1):87-97.