Sudan Black Stain
Sudan Black stain is intended for neutral fat staining.
It is thought that the staining of lipids depends on the physical properties of solution or adsorption. When the Sudan Black stain is dissolved in organic solvent, it exhibits a greater solubility in lipoids of frozen tissue than that in original solvents. So during staining, dyes will migrate into lipids from organic solvents resulting in lipid staining.
1. Sudan Black B solution
2. Nuclear Fast Red solution