Megha International

Xylidine Ponceau 2R (also known as Ponceau 2R or Acid Red 26) is an azo dye widely used as a biological stain and indicator dye. It belongs to the acid dye class, meaning it binds strongly to basic (cationic) proteins and tissue components, making it valuable in histology, cytology, and biochemistry.

Azure C is a basic cationic dye belonging to the thiazine dye family, commonly used in biological staining, histology, and cytology. It has a strong affinity for acidic tissue components, such as nucleic acids, making it suitable for nuclear staining and differential staining procedures.

Azure II is a cationic (basic) thiazine dye, closely related to Azure A, Azure B, and methylene blue. It is widely used in hematology, cytology, histology, and microbiology as a staining reagent and indicator dye. Azure II is especially important as a component of Romanowsky-type stains, where it provides excellent contrast for cellular structures.

Biebrich Scarlet is a sulfonated azo dye commonly used as a biological stain and pH indicator. It produces a bright red coloration and is widely applied in histology, cytology, and analytical chemistry. Its strong affinity for proteins and tissue components makes it valuable for differential staining procedures.

Ethyl Eosin (also known as Eosin Ethyl Ester) is a xanthene dye derived from fluorescein, chemically related to Eosin Y and Eosin B. It is primarily used as a biological stain, fluorescent dye, and pH indicator.

May-Grünwald Stain is a dye mixture commonly used in hematology and cytology for the staining of blood smears and bone marrow samples. It contains a combination of eosin and methylene blue dyes, providing excellent contrast between cytoplasm and nuclei. The powder form allows preparation of fresh working solutions for reliable and reproducible staining results in laboratory diagnostics.

Methyl Red Sodium Salt is the water-soluble sodium salt form of Methyl Red, an azo dye used as both a pH indicator and a biological stain. This form is preferred in aqueous systems because it dissolves more readily than the free acid. It is commonly used in acid-base titrations, microbiology (MR test), and as a staining reagent in biological and histological studies.

Orcein is a natural dye derived from lichens, widely used as a biological stain and indicator. It produces a deep reddish-brown to purple coloration and is effective for staining chromosomes, elastic fibers, and certain cell components

Phenolphthalein Complexone is a synthetic dye and analytical indicator used primarily in complexometric titrations, especially with EDTA. It exhibits a distinct color change from colorless to pink at the endpoint of titrations, allowing precise determination of metal ions such as calcium, magnesium, and other divalent metals. Its powdered form ensures stability and long shelf life for laboratory use.

SPADNS is a chemical indicator used primarily in fluoride and water analysis. It reacts with fluoride ions to produce a color change from red to colorless, allowing spectrophotometric or visual determination of fluoride concentration in water samples. The powdered form ensures high stability and ease of storage.

Sudan IV is a lysochrome (fat-soluble) azo dye used primarily for staining lipids, fats, and oils in biological, food, and industrial applications. It selectively dissolves in hydrophobic structures, producing a vivid red coloration, making it ideal for histological and biochemical studies of lipid content.

Tropaeolin OO is a synthetic azo dye used as a stain and analytical indicator in laboratory and industrial applications. It produces a bright orange coloration and is commonly used for pH indication, protein staining, and various biochemical assays. Its powder form allows preparation of fresh, reproducible solutions for reliable laboratory results.