Histochemistry

Fast red TR salt hemi(zinc chloride) is a red diazo dye with λmax = 284 nm, commonly used as a chromogenic substrate for alkaline phosphatase (AP) and in immunohisto-chemistry to detect specific proteins or antigens in tissue sections.

AMI5 (Eosin Y Disodium) is a soluble acidic red dye molecule. It is commonly used as a photoredox catalyst in organic synthesis.

TMB (BM blue) is a chromogenic substrate used in staining procedures in immunohistochemistry and as a visualizing reagent in ELISA.

Bromophenol Blue, an acid phthalein dye, is utilized both as a tracking dye for electrophoresis and as a pH indicator with a transition range of pH 3 to 4.6.

Congo Red (Direct Red 28) is an azo dye. It binding been used as a diagnostic test for the presence of amyloid in tissue sections.

Malachite green (Solid Green Crystals O) is an N-methylated diaminotriphenylmethane dye used for coloring.

Direct Blue 1 (Pontamine sky blue), a counterstain for background autofluorescence in immunofluorescence histochemistry, structurally resembles glutamate and operates as a potent, competitive VGLUT inhibitor, not impacting plasma membrane transporters. This compound stands out as the inaugural small molecule PrP ligand to inhibit Aβ binding.

Fenipentol (Pancoral) has the properties of Choleretics and Cholagogues.

Phenolphthalein (Phthalin) is an acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.

Rose bengal lactone (C.I. Solvent Red 141) is a rose bengal lactone stain commonly used to stain the nuclei of plant and animal cells.

Solvent Blue 35 (Sudan Blue II) is a dye utilized for coloring hydrocarbon-based and alcoholic solvents, as well as staining triglycerides in animal tissues.

TMB dihydrochloride (Sure Blue TMB dihydrochloride) is an enzyme-linked immunosorbent assays (ELISA) and an excellent colorimetric substrate for the detection of horseradish peroxidase (HRP)-labeled probes used in staining procedures immunohistochemistry.

BBD (NSC-240867) (Benzylamino-NBD) is a biochemical and chromogenic reagent.

Light Green SF Yellowish (Acid Green 5) is an alkaline stain used for staining animal tissues and for cytoplasmic and fiber staining in plant histology.

Thionin acetate (Thionine acetate) is a widely used metachromatic cationic dye in histological staining.

Bathophenanthroline is a compound used for the measurement of iron concentrations in aqueous, urine, and serum samples by colorimetry.

Nuclear Fast Red, an anthraquinone dye, serves primarily as a red nuclear counterstain in the presence of excess aluminum ions. Additionally, it functions as a histochemical and colorimetric reagent for calcium [1] and acts as a highly sensitive off/on fluorescent probe for detecting guanine [2].

3,3-Diaminobenzidine tetrahydrochloride dehydrate, commonly employed as a staining agent in histochemical (HC) and immunohistochemical (IHC) applications, facilitates peroxisomal staining and the detection of mitochondrial cytochrome c oxidase activity [1].

Azure B (Azure B chloride) is a cationic dye and the major metabolite of Methylene blue. Azure B is a selective, and reversible inhibitor of MAO-A (IC50s: 11 and 968 nM for recombinant human MAO-A and MAO-B).

Alizarin Cyanine Green F (NSC-41838) is an agent of green dye. It can be used to dye paper, chromed leather, wool, silk, and nylon (acid bath), to stain wood, and to color anodized aluminum, urea-melamine resin, and soap. It is used to color nylon 66 and/or nylon 6 nonabsorbable surgical sutures for use in general surgery and used for coloring drugs generally, including drugs intended for use in the area of the eye. Alizarin Cyanine Green F is also proposed for use in semi-permanent hair dye formulations as a direct dye at a maximum concentration of 0.3% in the finished cosmetic product.

Nile Blue A (Nile blue sulfate) is employed for differentiating melanins and lipofuscins, staining fats, and preparing amperometric glucose sensors.

Vat Red 15 (CI 71115) is a synthetic organic red dye used extensively in the textile industry for coloring cotton and other fibers.

Fast Red TR (napadisylate) serves as a versatile dye extensively utilized across various domains. This compound is a key tool in biological experiments, facilitating observation and analysis of cell structures, tracking and detection of biomolecules, evaluation of cell functions, differentiation of cell types, study of tissue pathology, and monitoring of microorganisms. Its applications extend beyond basic scientific research into clinical diagnostics, traditional textile dyeing, functional textile processing, food pigments, and dye-sensitized solar cells, making it indispensable in both traditional and emerging fields.

Fast Sulphon Black F serves as a specific copper indicator and is applicable for EDTA titration [1].