Azure B by Research Lab Fine Chem Industries is a high grade reagent. Also known as Azur B trimethylthionine chloride, this organic compound is a dye. The reagent is available as a crystalline dark green coloured powder which is soluble in water and sparingly soluble in alcohol. It has a melting point of 205 - 210 C at which it decomposes. This is a metachromatic basic dye, which stains cellular components ranging from green (chromosomes) and blue (nucleoli and cytoplasmic ribosomes), to red color (deposits containing mucopolysaccharides). CAS No.: 531-55-5 Quantity Provided: 5 gm per bottle Molecular formula: C15H16ClN3S Molecular weight: 305.83 Assay: minimum 90 % Azure B has a variety of applications in chemical and biological sectors. This reagent is used in various dye preparations in biological staining applications. It is used as a component of polychrome Giemsa's stain for blood protozoa. It is also used for staining semi-thin sections of plant tissue. It is incorporated in the Romanowsky stain, which is used for the staining of blood films. It can additionally be used for the localization of nucleic acids. This reagent is suitable for industrial synthesis of products and research applications.