"SIGMA ALDRICH MICROSCOPY"

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As a direct dye, Direct Yellow 27 is an acid dye with large molecules that will bind to cellulose fibers directly. It is mono azo dye with good light fastness.

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Fluoroshield™ is an aqueous mounting medium for preserving fluorescence of tissue and cell smears.

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Bromophenol blue has been used in the sample buffer prepared for western blotting. A tracking dye for nucleic acid or protein electrophoresis in agarose or polyacrylamide gels.

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Solvent Blue 38 is a phthalocyanine stain, used for staining myelin, neurons and glial fibres.

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o-Tolidine is a diacidic dye which is sparingly soluble in water and easily soluble in ether and alcohol. On exposure to chlorine or bromine vapors, it forms an intense blue color. This forms the basis for detection of chlorine, nitrates and hydrogen peroxide in air or water. It turns yellow on reacting with free chlorine. o-Tolidine easily forms acid salts.

Supplier: SIGMA ALDRICH MICROSCOPY

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6,4 and below, phenol red solution will have a yellow colour. At a pH of 8,2 and above, it will have a red colour. It is commonly used in culture media to detect neutral to acidic pH changes.

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Carmine is a red compound and is generally used with aluminum, iron and other metal salts to enhance its activity. During smear preparation, it is required for chromatin staining in fresh material. In presence of aluminum chloride, it is used for the staining of glycogen.

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Nile Blue A has been used for the staining of eggs before transferring them to the hosts. It has been used for the staining of cells.

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Naphthol AS-BI Phosphoric acid solution for use in the Sigma Acid Phosphatase (TRAP) Procedure, Kit 387A.

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Pyronin G, Sigma-Aldrich®

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1,3-Diphenylacetone-p-toluenesulphonylhydrazone ≥98%, Sigma-Aldrich®

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Redox indicator. Blue fluorescence until oxidized to ethidium. Dihydroethidium has been used as a superoxide probe in bovine pulmonary artery endothelial cell (BPAEC).

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Papanicolaou stain imparts a characteristic range of coloration to exfoliative cells of vaginal, cervical, prostatic and other body secretions, allowing critical examination of nuclei and cytoplasmic components.

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Biotinylation reagent

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Sudan IV is a hydrophobic azo dye. It stains triglycerides and imparts an intense red colour. The dye does not stain lipid droplets or phospholipids. It is also used a diagnostic assay manufacturing, hematology, histology.

Supplier: SIGMA ALDRICH MICROSCOPY

Sudan II has been used to determine its presence in commercial spices such as hot chilli food samples (LC–ESI–MS/MS).