<prompt> Stain not used for lipidOil red 0Congo redSudan IIISudan black  <response>: Congo red Congo red is not used in lipid staining. It is used in the staining of antyloid protein STAINING FOR LIPIDS Non polar lipids Examples Stain used Unconjugated lipids Fatty acids Oil red 0, Sudan black, Sudan III IV Cholesterol Filipin Esters Cholesteryl esters Schultz Monodi and Tri-glycerides Calcium lipase Polar lipids - Phospholipids - Glycerol bases Phosphatidylcholine Nile blue sulfate Phosphatidylserine Nile blue sulfate Phosphatidylethanol amine Plasmal reaction - Sphingosine-base Sphingomyelins Ferric hematoxylin - Glycolipids Cerebrosides PAS Sulfatides AcetoneToluidine blue Gangliosides PAS 