Lucifer Yellow CH dipotassium is a fluorescent dye, a water-soluble biological tracer (Ex/Em = 430/540 nm) containing a free hydrazino group that can react with aldehydes, used for neuronal tracing and gap junction detection.

Cy5.5 is a near-infrared fluorescent dye for labeling biomolecules such as peptides, proteins and oligonucleotides (Ex=673 nm, Em=707 nm)[2].

Cy5 (Sulfo-Cyanine5) is a phalloidin dye used to label amino groups in peptides, proteins and oligonucleotides.

Nile Red ((Nile Blue A oxazone)) is a lipophilic, environment-sensitive fluorescent dye. Highly hydrophobic, with fluorescence significantly enhanced in lipid-rich environments. Commonly used for specific staining of intracellular lipid droplets, with excitation/emission wavelengths of 559/635 nm.

Cyanine5 NHS ester chloride is a reactive dye with red fluorescence that requires a small amount of organic cosolvent (such as DMF or DMSO) to label amino groups in peptides, proteins, and oligonucleotides.

Hydroxystilbamidine ((E)-hydroxystilbamidine), a dye capable of binding to both DNA and RNA, has been found to be a powerful inhibitor of cellular ribonucleases.

DiD perchlorate is a lipophilic cyanine dye.

CY5-N3 (Sulfo-Cyanine5-azide) is an anthocyanin fluorescent dye with azide groups, utilized for cell imaging, tissue imaging, and in vivo imaging.

Sulfo-Cy5-TCO is a water-soluble fluorescent dye and click chemistry reagent with the ability to detect tetrazine groups by having a TCO group.

Sulfo-Cy5.5 is a near-infrared fluorescent dye (Ex=673 nm, Em=707 nm) that can be used to label biomolecules such as peptides, proteins, and oligonucleotides [2].

BODIPY 630/650X is a fluorescently labeled conjugate of the adenosine receptor ligand N-ethylcarboxamido-adenosine (NECA), which exhibits distinct excitation and emission maxima at approximately 630 nanometers and 650 nanometers, respectively, making it a valuable tool for fluorescence-based assays and imaging studies targeting adenosine receptor activity and distribution.

Di-4-ANEPPDHQ is a voltage-sensitive dye used for visualizing membrane microdomains in live Arabidopsis cells.

DiSC3(5) is a lipophilic cationic fluorescent probe sensitive to changes in membrane potential. 3,3'-Dipropylthiadicarbocyanine iodide accumulates in hyperpolarized cell membranes, leading to fluorescence quenching; when the membranes are depolarized, the dye is released from the cells and the fluorescence intensity is enhanced, which is used for real-time monitoring of mitochondrial membrane potential changes and membrane hyperpolarization. The maximum excitation/emission wavelength was 622/670 nm.

DDAO is a promising near-infrared (NIR) red fluorescent probe with a long emission wavelength (λem = 656 nm) and a tunable excitation wavelength (600-650 nm). It can be designed for detecting the activities of various enzymes such as β-galactosidase, sulfatase, protein phosphatase 2A, carboxylesterase 2, human albumin, and esterases.

CY5 triethylamine salt is a water-soluble dye, Excitation (nm):649, Emission (nm): 670.

CY5-SE triethylamine salt (Fluorolink Cy5 triethanolamine salt) is a hydrophilic amine-reactive fluorescent probe. It displays excitation/emission maxima of 646/662 nm, respectively. Cy5-SE-conjugated ligands have been used in the characterization of hematopoietic tumor microenvironments.

Cy 5 hydrazide (Cyanine5 hydrazide) is a cyanine dye, used for labeling aldehydes and ketones as active chromophores.

Cyanine5.5 amine is an amino-modified Cy5.5 near-infrared (NIR) fluorescent dye with excitation/emission wavelengths of 648/710 nm. It offers the advantage of low fluorescence background and is suitable for group conjugation and in vivo imaging.

Cy5-DBCO is a near-infrared, anthocyanine fluorescent dye Cy5 (Cyanine 5) derivative with an excitation wavelength of 650 nm and an emission wavelength of 670 nm.DBCO-Sulfo-Cy5 contains a DBCO moiety, which can undergo SPAAC click chemistry with molecules that contain Azide moieties.

Alexa fluor 647 maleimide is a water-soluble fluorescent dye that maintains stability under a broad range of physiological conditions. Alexa fluor 647 maleimide facilitates the covalent attachment of fluorescent groups to proteins through selective reaction with thiol groups, thereby enabling precise labeling. This labeling method offers both high sensitivity and specificity, allowing detection of proteins at very low concentrations. Alexa fluor 647 maleimide is widely applied in the study of protein expression and localization, and it can also be conjugated to antibodies for labeling cell surface antigens or specific proteins within tissues [Ex/Em(nm)=651/671].

NIAD-4 is a near-infrared (NIR) fluorescent label targeting amyloid-beta (Ki=10 nM) capable of crossing the blood-brain barrier. It serves as a fluorophore for optical imaging of Aβ in the central nervous system (CNS) for Alzheimer's disease, with absorption peaks at 475–480 nm.

CY5-YNE is a CY5-derived dye. CY5 is an amine-reactive fluorophore with excitation/emission wavelengths of 650/670 nm, commonly used for labelling nucleic acids and proteins.

BODIPY 665/676 is a lipophilic, radical-sensitive fluorescent probe utilized to investigate radical-driven lipid autoxidation [1].

5-Cyano-2,3-di-(p-tolyl)tetrazolium chloride (CTC), a redox-sensitive red fluorescent dye, effectively measures metabolic activity in microorganisms. It emits at a maximum wavelength of 602 nm [1].