Sudan Red 7B (Synonyms: C.I. 26050, Ceres Red 7B, Fat Red 7B, Hexatype Carmine B, NSC 326202, Solvent Red 19)

Sudan red 7B is an azo dye.¹ It displays an absorption maxima of 525 nm.² Sudan red 7B has been used to stain lipids in hepatocytes and suberin lamellae in plant cell walls.^3,4 It has also been included as a standard in LC-MS/MS-based protocols for the detection of banned colorants in foodstuffs.¹

1.Pardo, O., YusÀ, V., LeÓn, N., et al.Development of a method for the analysis of seven banned azo-dyes in chilli and hot chilli food samples by pressurised liquid extraction and liquid chromatography with electrospray ionization-tandem mass spectrometryTalanta78(1)178-186(2009) 2.Nagase, M., Matsueda, T., and Osaki, Y.Determination of Sudan III, Sudan IV and Sudan red 7B in water by high performance liquid chromatography after mixing extractionAnal. Sci.5(2)157-160(1989) 3.Delzenne, N.M., Hernaux, N.A., and Taper, H.S.A new model of acute liver steatosis induced in rats by fasting followed by refeeding a high carbohydrate-fat free diet. Biochemical and morphological analysisJ. Hepatol.26(4)880-885(1997) 4.Brundrett, M.C., Kendrick, B., and Peterson, C.A.Efficient lipid staining in plant material with Sudan red 7B or fluorol [correction of fluoral] yellow 088 in polyethylene glycol-glycerolBiotech. Histochem.66(3)111-116(1991)