Tags: Chemical Compound, Chemical Substance.

Oil Red O (Solvent Red 27 Sudan Red 5B C.I. 26125 C26H24N4O) is a lysochrome (fat-soluble dye) diazo dye used for staining of neutral triglycerides and lipids on frozen sections and some lipoproteins on paraffin sections. It has the appearance of a red powder with maximum absorption at 518 (359)nm.

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IUPAC name
1-(25-dimethyl-4-(2-5-dimethylphenyl) phenyldiazenyl) azonapthalen-2-ol

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