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.

Thioflavin T (Basic Yellow 1) is a widely used dye for visualizing and is a cationic Benzothiazole dye that shows enhanced fluorescence upon binding to amyloid in tissue sections.

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

Thioflavine S (Direct Yellow 7) is a fluorescent histochemical marker.

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.

Sulforhodamine 101 (SR101) is a red fluorescent dye.

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.

Toluidine Blue (Blutene chloride), a phenothiazine, is used as a biological stain, a hemostatic, and a dye for silk and wool. Blutene chloride is also used as a diagnostic aid for gastric neoplasms and oral, and used in the identification of the parathyroid gland in thyroid surgery.

1-Naphthyl acetate is usually used in a rapid staining method for identification of macrophages. 1-Naphthyl acetate is a potent chromogenic substrate for the detection of erythrocyte acetylcholinesterase (AChE) activity. It has the potential to detect organophosphorus pesticide poisoning.

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.

DAB tetrahydrochloride dihydrate is widely employed as a staining agent in histochemical (HC) and immunohistochemical (IHC) applications, where it plays an important role in peroxisomal staining procedures and in the detection of mitochondrial cytochrome c oxidase activity.

Nuclear Fast Red is an anthraquinone dye that serves as a red nuclear counterstain when aluminum ions are present in excess, thereby aiding in histological visualization of nuclear components. Nuclear Fast Red additionally functions as a histochemical and colorimetric reagent for calcium detection,Nuclear Fast Red further acts as a highly sensitive “off/on” fluorescent probe for the detection of guanine, making it a multifunctional research reagent.

Sudan IV (Solvent Red 24) is a lysochrome (fat-soluble dye) diazo dye used for the staining of triglycerides,lipids and lipoproteins on frozen paraffin sections.

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).

Azure A eosinate, a dye for hematological and histological applications, can serve as a new photosensitizer prototype to determine the growth inhibition of Candida albicans [1].

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

Eosin B (Acid Red 91) serves as a versatile dye utilized across various domains. Commonly employed in biological experiments, it aids in observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, investigating tissue pathology, and monitoring microorganisms. Its utility extends beyond basic scientific research to include clinical diagnostics and a broad spectrum of applications. Additionally, Eosin B is employed in traditional sectors like textile dyeing and emerging areas such as functional textile processing, food pigments, and dye-sensitized solar cells.

Methyl violet dye is a versatile dye utilized in a variety of applications. It serves as an essential tool in biological experiments, aiding researchers in observing and analyzing cell structures, tracking and detecting biomolecules, evaluating cell functions, distinguishing cell types, studying tissue pathology, and monitoring microorganisms. Its uses extend from fundamental scientific research to a broad spectrum of clinical diagnostics. Additionally, dyes are extensively employed in traditional sectors like textile dyeing and are increasingly significant in emerging areas such as functional textile processing, food pigments, and dye-sensitized solar cells.