Sudan Red 7B is a non-fluorescent, fat-soluble azo dye with a maximum absorption wavelength of 525nm[1, 2]. Sudan Red 7B can be used to stain fat in plant and animal tissues and can also indicate the presence of suberin in cell walls[3, 4]. Sudan Red 7B is also used as a standard for the detection of banned colorants in food[5].
References:
[1] Firoozeh F, Shahamat Y D, Rodríguez-Couto S, et al. Bioremediation for the Decolorization of Textile Dyes by Bacterial Strains Isolated from Dyeing Wastewater[J]. Jordan Journal of Biological Sciences, 2022, 15(2).
[2] Hassan Q M A, Manshad R K H. Optical limiting properties of sudan red B in solution and solid film[J]. Optical and Quantum Electronics, 2015, 47: 297-311.
[3] Mozgová I, Muñoz-Viana R, Hennig L. PRC2 represses hormone-induced somatic embryogenesis in vegetative tissue of Arabidopsis thaliana[J]. PLoS Genetics, 2017, 13(1): e1006562.
[4] Yang C, Zhang X, Wang T, et al. Phenotypic plasticity in the structure of fine adventitious Metasequoia glyptostroboides roots allows adaptation to aquatic and terrestrial environments[J]. Plants, 2019, 8(11): 501.
[5] 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 spectrometry[J]. Talanta, 2009, 78(1): 178-186.
Sudan Red 7B是一种非荧光、脂溶性的偶氮染料，最大吸收波长为525nm[1, 2]。Sudan Red 7B可用于对植物和动物组织中的脂肪进行染色，还可以指示细胞壁中是否存在木栓质[3, 4]。Sudan Red 7B还被用作检测食品中的禁用着色剂的标准品[5]。