Stain Papanicolaou's solution hematoxylin harris 4L by Medil for cancer diagnosis. The cytological staining technique developed by Papanicolaou remains the standard method for diagnosing cancer and hormone cycle. With the use of Papanicolaou's solution hematoxylin harris stain, excellent nuclear staining can be achieved in 3-5 minutes. Cell nuclei are stained in shades of blue, dark violet to black. A 500ml bottle is sufficient for staining 1500 to 2500 microscope slides. Papanicolaou's solution hematoxylin harris stain is an IVD approved product and CE certified, so it can be used for clinical diagnostic purposes.