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Ferristatin II (Direct Black 38 free acid) is a polysulphonated dye and promotes the degradation of transferrin receptor-1 in vitro and in vivo.

C.I. Direct Blue 2 is an agent of dye.

CI Direct Brown 2 is a direct dye. It is soluble in water and ionizable to form colored anions. It also can directly dye cellulose fibers or protein fibers.

C.I. Direct Black 17 is a compound of dye.

C.I. Direct Red 1, disodium salt is a dye.

Direct Green 6 is a green dye.

C.I. Direct Yellow 27 is a multifunctional dye. Dyes are crucial tools in biological experiments, aiding researchers in observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Their applications span from basic scientific research to a wide range of clinical diagnostics. Dyes are also extensively used in traditional fields such as textile dyeing, as well as in emerging fields like functional textile processing, food pigments, and dye-sensitized solar cells.

Direct Violet 1 (CCRIS 2413) is an agent of dye.

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.

Direct Black 38 (Chlorazol Black E) is a black azo dye that absorbs various colors of light and is commonly used in the textile industry.Direct Black 38 is genotoxic and induces unplanned DNA synthesis in rat liver and bone marrow micronuclei.

Direct Red 80 (Sirius Red), a tetra azo dye, is used to detect amyloid and enhance the birefringence of collagen fibers in tissue sections.

Evans blue (C.I. 23860) is an effective inhibitor of glutamate uptake by synaptic vesicles and also acts as an antagonist of AMPA/kainate receptors. As an azo dye, Evans blue binds to serum albumin, enabling detection of blood-brain barrier integrity and permeability.

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.

Diphenyl Blue (Direct Blue 14) (Direct Blue 14) is used as a dye for a group of azo dye.

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

Brilliant Yellow (Direct Yellow 4) is a potent and selective VGLUT inhibitor, a dye that is photodegradable.

Solaminrot 4B is an agent of dye.

C.I. 24280 is a dye.

Chrysophenine CI Direct Black 80 is an azo dye.

Congo Red (Standard) is the standard substance of Congo Red, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. 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.

C.I. Direct Violet 66 is a multifunctional dye. Dyes are essential tools in biological experiments, aiding researchers in observing and analyzing cell structures, tracking biomolecules, evaluating cell functions, distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Their applications span basic scientific research to clinical diagnostics. Dyes are also widely used in traditional fields such as textile dyeing, as well as emerging fields like functional textile processing, food pigments, and dye-sensitized solar cells.

C.I. Direct Violet 9, a versatile dye, serves a pivotal role across various fields. This compound is crucial not only in biological experiments where it enables the observation and analysis of cell structures, tracking of biomolecules, evaluation of cell functions, differentiation of cell types, detection of biomolecules, examination of tissue pathology, and monitoring of microorganisms, but also spans a broad spectrum of applications. Beyond basic scientific research and clinical diagnostics, C.I. Direct Violet 9 is extensively employed in traditional sectors like textile dyeing and in cutting-edge areas, including functional textile processing, food pigments, and dye-sensitized solar cells.

Direct Blue 108, a triphenyl two oxazine compound, is utilized for dyeing cotton, viscose fiber, silk, and their blended fabrics [1].

Direct Yellow 44, a versatile dye, serves crucial roles across various scientific and industrial domains. This compound facilitates the observation and analysis of cell structures, enables the tracking of biomolecules, and assists in evaluating cell functions. It is instrumental in distinguishing cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. Its utility spans from fundamental research to a broad array of clinical diagnostics. Beyond its scientific application, Direct Yellow 44 is employed extensively in conventional textile dyeing, as well as in progressive sectors like functional textile processing, food pigments, and dye-sensitized solar cells.