Neutral red pH indicator solution is widely used in biological and chemical laboratories to determine the pH of various solutions. It is particularly valuable in cell culture studies, where it helps monitor the pH of the medium to ensure optimal growth conditions for cells. The solution is also employed in microbiology to assess cell viability, as living cells can uptake and retain the dye, while dead cells do not. Additionally, it is utilized in environmental science to test the pH of soil and water samples, providing insights into environmental health. In histology, Neutral red is used for staining tissues, aiding in the visualization of cellular structures under a microscope. Its ability to change color based on pH makes it a versatile tool in various scientific applications.