Product Description: Acid Red 4 is an azo dye. The wavelength of maximum absorbance for Acid Red 4 is 508 nm[1].
Formula: C17H13N2NaO5S
References: [1]M F Coughlin, et al. Degradation of azo dyes containing aminonaphthol by Sphingomonas sp strain 1CX. J Ind Microbiol Biotechnol. 1999 Oct;23(4-5):341-346.