Description

This 500mL bottle of Safranine is a laboratory-grade reagent and biological stain. Identified by C.I. 50240, it contains an aqueous solution of Safranin O (also known as Basic Red 2), a cationic dye with the chemical formula C20​H19​ClN4​ and a molecular weight of approximately 350.85 g/mol. The solution is housed in an opaque white bottle with a secure screw cap and is widely used as a counterstain in microbiology and histology. It is essential for the Gram staining method, where it colors Gram-negative bacteria pink or red to provide clear differentiation from the blue-black Gram-positive cells.