Synonyms: Oil Red, 1-((2-Methyl-4-(o-tolyldiazenyl)phenyl)diazenyl)naphthalen-2-ol, Scarlet Red, Oil Red BB, 1-({2-Methyl-4-[(2-methylphenyl)diazenyl]-phenyl}diazenyl)-2-naphthol, Scarlet R, Biebrich scarlet R, Lipid Crimson, Scarlet Red Scharlach, Oil Red IV, Fat Red B, Solvent Red 24, 1-(2-Methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol