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This stain is a hydrophobic azo dye which is used to colour nonpolar substances -
Negative stain that has a particularly fine grain, therefore provides good contrast for small particles and individual molecules. 25g. -
Sudan Black B is a fat soluble diazo dye and can be used to stain neutral triglycerides and lipids. -
Tartrazine is an anionic, hydrophilic azo dye with an orange-yellow colour.