histology

Ruthenium Red (Ammoniated ruthenium oxychloride) is a polycationic dye widely used for electron microscopy (EM) of cells, tissues and vegetative bacteria. Ruthenium red strongly reacts with phospholipids and fatty acids and binds to acidic mucopolysaccharides. Ruthenium red is a L-type calcium current (ICa) blocker, blocks Ca2+ uptake and release, and voltage-sensitive Ca2+ channels

Light Green SF Yellowish (Acid Green 5) is an alkaline stain used for staining animal tissues and for cytoplasmic and fiber staining in plant histology.

Thionin acetate (Thionine acetate) is a widely used metachromatic cationic dye in histological staining.

Giemsa stain, used in histology and microbiology, can stain chromatin and the nuclear membrane. It is employed in histopathology to detect malaria and other microorganisms, such as Histoplasma, Leishmania, Toxoplasma, and Pneumocystis [1].

Crystal Ponceau 6R, a red azo dye, is utilized in histology for staining fibrin with the martius, scarlet, and blue (MSB) Trichrome stain [1].

Mucicarmine is utilized in histology to visualize acid mucopolysaccharides in tissue sections. It identifies mucin (deep rose), aiding in the detection of mucin-positive cancers such as liver carcinoma [1].