What color does the solution turn if lipids are present when testing with Sudan Red?

What color does the solution turn if lipids are present when testing with Sudan Red?

• A. Blue
• B. Green
• C. Red
• D. Yellow

Answer: (C)

When testing for the presence of lipids using Sudan Red, the solution turns red if lipids are present. Sudan Red is a fat-soluble dye that selectively stains lipids within the sample. This happens because the dye dissolves in the lipid molecules, leading to a visible color change that indicates the presence of fats or oils. The staining process helps to visually confirm the presence of lipids in the testing sample. Therefore, the formation of a red hue is a clear indication that lipids are indeed present.

When testing for the presence of lipids using Sudan Red, the solution turns red if lipids are present. Sudan Red is a fat-soluble dye that selectively stains lipids within the sample. This happens because the dye dissolves in the lipid molecules, leading to a visible color change that indicates the presence of fats or oils. The staining process helps to visually confirm the presence of lipids in the testing sample. Therefore, the formation of a red hue is a clear indication that lipids are indeed present.