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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.

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Produces highly insoluble dark green stain in histochemical studies.

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2-Amino-5,6-dimethylbenzimidazol, Sigma-Aldrich®

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Yellow counterstain suitable for a wide range of histological staining procedures.

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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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Intended for use in the silver stain (modified GMS) procedure.

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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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Used as a red nuclear counterstain in various cytochemical procedures.

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Cell impermeable fluorescent probe for Ca2+.

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

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1-Methoxy-5-methylphenazinium methyl sulfate (MPMS) is a photochemically stable electron-transport mediator between NAD(P)H and tetrazolium dyes. The reduced form of MPMS converts tetrazolium salt to purple precipitate formazan. It is a very stable and non-enzymic electron carrier that mediates electron transfer by dehydrogenases in vitro to various electron acceptors such as tetrazolium dyes or the electrode of an enzymic electric cell.

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Rhodamine 123 is useful as a laser dye and to have selective cell growth effects. It has also been used to measure mitochondrial membrane potential.

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Fast Red Violet LB Salt has been used for the detection of tartrate-resistant acid phosphatase (TRAP) in tissue sections.

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Useful for staining DNA, chromosomes and nuclei. May be used for fluorescence microscopy or flow cytometry.
Excitation max. = 346 nm
Emission max. = 460 nm
bisBenzimide H 33342 trihydrochloride has been used for the staining of viable and apoptotic.

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Kit is used to demonstrate acid phosphatase and tartrate resistant acid phosphatase (TRAP) in blood, bone marrow and tissue touch preparations.

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Arsenazo III has been used as a color forming reagent to determine uranium concentration.

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Certified for Giemsa stain for blood films and for the Wolbach′s Giemsa method for paraffin sections. Giemsa is a versatile polychromatic stain, which is suitable for staining a diverse range of specimens. It is a buffered thiazine-eosinate solution designed to provide coloration of blood cells. Giemsa’s stain is frequently used for diagnostic purposes in hematology to differentiate the nuclear and cytoplasmic morphology of platelets, RBCs, WBCs, and parasites. It is frequently used in combination with other dye solutions as May-Grunwald’s solution for Pappenheim (MGG) and Wright-Giemsa. The Giemsa stain was adapted to histology due to its unique staining of chromatin, nuclear membranes, and cytoplasmic elements. Giemsa′s staining solution is composed of methylene blue, azure, and eosin.

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Rhodamine 6G has been used as a leukocyte marker to study the interaction between leukocytes and the vascular endothelium. It has also been used to label platelets.

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Fluorescent Brightener (Calcofluor White M2R) is used for the staining of fungi and as a viability stain. Industrial uses include use as a fluorescent brightening agent for cellulose and polyamide fabrics, paper and in detergents and soaps.

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Percoll® is a classic medium for density gradient centrifugation of cells, viruses, and subcellular particles. It consists of colloidal silica particles of 15 – 30 nm diameter (23% w/w in water), coated with polyvinylpyrrolidone (PVP).

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2-Aminobiphenyl is a substrate for UGTs (UDP-glucuronosyltransferases), including UGT1A4, UGT2B13 and UGT2B16.

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The kit is based upon the method of Gordon and Sweets.

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Chlorazol Black has been used to monitor the infection of mycorrhizal Allium porrum in plant roots. It has also been used for the staining of copepods.

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Tetrazolium Violet is a monotetrazolium salt which forms water-insoluble formazans. These salts are mainly used as indicators of extracellular redox activity and cell redox potential. Tetrazolium violet is positively charged and cell-permeable.

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Bathocuproinsulfonat Dinatriumsalz Hydrat für die spektrophotometrische Bestimmung von Cu und Fe , Sigma-Aldrich®

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Utilizes New Methylene Blue for the identification of reticulocytes in blood films.

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Intended for the histochemical demonstration of neutrophil granules in blood or bone marrow films.

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Hematoxylin has been used for staining gastric cancer tissues, myocardial tissue, heart sections and ovarian nuclei.

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In living mice, acriflavine hydrochloride has been used in the confocal laser endomicroscopy to check the crypt structure in mucosa. It has also been used in Neurospora strain selection by checking the acriflavine resistance.

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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).