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Fluorescent Dyes

The fluorescent dye family includes commonly used fluorophores such as fluorescein, rhodamines, cyanine dyes (the Cy series), and BODIPY, together with their functionalized derivatives, to meet different needs in molecular labeling, fluorescence imaging, and analytical research. Some dyes are combined with precision PEG linkers to provide hydrophilic spacers between the fluorophore and the labeling target, facilitating different fluorescent-probe designs. In life-science research, these products can label proteins, peptides, nucleic acids, antibodies, and other biomolecules for cell imaging, flow cytometry, binding assays, and molecular-interaction studies. Dyes with different emission ranges can also trace nanocarrier uptake, cellular localization, and distribution, providing visualization tools for delivery-mechanism research. In materials research, fluorescent dyes and their PEGylated derivatives are suitable for tracing polymers, liposomes, nanoparticles, and functional surfaces. Available amine, carboxyl, NHS ester, maleimide, and other reactive end groups help match different conjugation targets. Spectral properties and labeling performance should be evaluated for the specific dye structure and application system.

Fluorescein-PEG-CH2CH2COONHS Ester RhodamineB-PEG-CH2CH2COONHS Ester Cy3-PEG-NHS Ester Cy5-PEG-NHS Ester Cy7-PEG-NHS Ester BODIPY-PEG-NHS Ester Fluorescein-PEG-Mal RhodamineB-PEG-Mal Cy3-PEG-Mal Cy5-PEG-Mal Cy7-PEG-Mal BODIPY-PEG-Mal TAMRA-PEG-NHS Ester TAMRA-PEG-Mal Dansyl-PEG-NHS Ester Palladium(II) Tetraphenyltetrabenzoporphyrin Hydroxymethylbiphenyl-functionalized palladium(II) tetraphenyltetrabenzoporphyrin (PdTPTBP-OH)Methacrylate-functionalized palladium(II) tetraphenyltetrabenzoporphyrin monomer (PdTPTBP monomer)3-Hydroxypropyl-functionalized Sulfur-Substituted Nile Blue (NBS-OH)3-Hydroxypropyl-functionalized Selenium-Substituted Nile Blue (NBSe-OH)2-(4-(2-aminoethoxy)phenyl)-3-hydroxy-4H-chromene-4-thione (SHF-NH2)2-(4-(2-aminoethoxy)phenyl)-3-hydroxy-4H-chromene-4-selenone (SeHF-NH2)N-(4-(hydroxymethyl)-2-oxo-2H-chromen-7-yl)-N-(2-nitrobenzyl)nitrous amide (CouNO-NO2)N-benzyl-N-(4-(hydroxymethyl)-2-oxo-2H-chromen-7-yl)nitrous amide (CouNO-H)N-(4-(hydroxymethyl)-2-oxo-2H-chromen-7-yl)-N-(2-methoxybenzyl)nitrous amide (CouNO-OCH3)N-(4-(hydroxymethyl)benzyl)-N-(4-methyl-2-oxo-2H-chromen-7-yl)nitrous amide N-(2-hydroxyethyl)-N-(7-nitrobenzo[c][1,2,5]oxadiazol-4-yl)nitrous amide (NBDNO-OH)N-(2-hydroxyethyl)-N-(4-nitrophenyl)nitrous amide (NBNO-OH)N-(2-hydroxyethyl)-N-(4-nitro-3-(trifluoromethyl)phenyl)nitrous amide N-benzyl-N-(2-(2-hydroxyethyl)-1,3-dioxo-2,3-dihydro-1H-phenalen-6-yl)nitrous amide N-benzyl-N-(4-(hydroxymethyl)phenyl)nitrous amide N-benzyl-N-(4-(hydroxymethyl)-2-nitrophenyl)nitrous amide BODIPY-PEG-CH2CH2COOH Cy3-PEG-CH2CH2COOH Cy5-PEG-CH2CH2COOH Cy7-PEG-CH2CH2COOH TAMRA-PEG-CH2CH2COOH RhodamineB-PEG-CH2CH2COOH Fluorescein-PEG-CH2CH2COOH

Fluorescein-PEG-CH2CH2COONHS Ester

Fluorescein-poly(ethylene glycol)-N-hydroxysuccinimide ester (Fluorescein-PEG-NHS) is a functional dye combining a fluorescein chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Fluorescein-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

RhodamineB-PEG-CH2CH2COONHS Ester

Rhodamine B-poly(ethylene glycol)-N-hydroxysuccinimide ester (RhodamineB-PEG-NHS) is a functional dye combining a rhodamine B chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Rhodamine B probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

Cy3-PEG-NHS Ester

Cyanine 3-poly(ethylene glycol)-N-hydroxysuccinimide ester (Cy3-PEG-NHS) is a functional dye combining a Cy3 cyanine chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy3 cyanine-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

Cy5-PEG-NHS Ester

Cyanine 5-poly(ethylene glycol)-N-hydroxysuccinimide ester (Cy5-PEG-NHS) is a functional dye combining a Cy5 cyanine chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy5 cyanine-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

Cy7-PEG-NHS Ester

Cyanine 7-poly(ethylene glycol)-N-hydroxysuccinimide ester (Cy7-PEG-NHS) is a functional dye combining a Cy7 cyanine chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy7 cyanine-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

BODIPY-PEG-NHS Ester

Boron-dipyrromethene-poly(ethylene glycol)-N-hydroxysuccinimide ester (BODIPY-PEG-NHS) is a functional dye combining a BODIPY chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; BODIPY-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 5–64 · 26 Catalog Nos.View Series →

Fluorescein-PEG-Mal

Fluorescein-poly(ethylene glycol)-maleimide (Fluorescein-PEG-MAL) is a functional dye combining a fluorescein chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Fluorescein-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

RhodamineB-PEG-Mal

Rhodamine B-poly(ethylene glycol)-maleimide (RhodamineB-PEG-MAL) is a functional dye combining a rhodamine B chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Rhodamine B probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

Cy3-PEG-Mal

Cyanine 3-poly(ethylene glycol)-maleimide (Cy3-PEG-MAL) is a functional dye combining a Cy3 cyanine chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy3 cyanine-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

Cy5-PEG-Mal

Cyanine 5-poly(ethylene glycol)-maleimide (Cy5-PEG-MAL) is a functional dye combining a Cy5 cyanine chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy5 cyanine-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

Cy7-PEG-Mal

Cyanine 7-poly(ethylene glycol)-maleimide (Cy7-PEG-MAL) is a functional dye combining a Cy7 cyanine chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Cy7 cyanine-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

BODIPY-PEG-Mal

Boron-dipyrromethene-poly(ethylene glycol)-maleimide (BODIPY-PEG-MAL) is a functional dye combining a BODIPY chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; BODIPY-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

TAMRA-PEG-NHS Ester

Tetramethylrhodamine-poly(ethylene glycol)-N-hydroxysuccinimide ester (TAMRA-PEG-NHS) is a functional dye combining a tetramethylrhodamine chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Tetramethylrhodamine-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

TAMRA-PEG-Mal

Tetramethylrhodamine-poly(ethylene glycol)-maleimide (TAMRA-PEG-MAL) is a functional dye combining a tetramethylrhodamine chromophore, a defined-length PEG spacer, and a maleimide conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The maleimide can add to cysteine thiols or other thiolated modules, providing a handle for conjugation at thiol sites. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Tetramethylrhodamine-probe construction; Cysteine-site modification; Thiol-selective bioconjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

Dansyl-PEG-NHS Ester

5-Dimethylaminonaphthalene-1-sulfonyl-poly(ethylene glycol)-N-hydroxysuccinimide ester (Dansyl-PEG-NHS) is a functional dye combining a dansyl chromophore, a defined-length PEG spacer, and an N-hydroxysuccinimide ester conjugation terminus. The PEG spacer is available in discrete chain lengths with different degrees of polymerization. The NHS ester can form amide bonds with primary amines, enabling conjugation to amine-containing small molecules, peptides, proteins, or material surfaces. The PEG spacer separates the chromophore from the target attachment site. Chain length can be selected in relation to labeling position, local environment, and conjugate dispersion. Applications: Fluorescent labeling and tracing; Dansyl-probe construction; Amine modification in proteins and peptides; Amine-functionalized surface conjugation. Customization available.

n = 4–96 · 26 Catalog Nos.View Series →

Palladium(II) Tetraphenyltetrabenzoporphyrin

Palladium(II) Tetraphenyltetrabenzoporphyrin (PdTPTBP) is a structurally defined functional small molecule. The principal structural feature is a palladium(II)-coordinated tetraphenyltetrabenzoporphyrin. Absorption, dispersion, and relevant reaction behavior can be studied under matched media and optical measurement conditions to select attachment strategies based on structural changes. The metal–porphyrin conjugated scaffold provides a starting structure for photosensitizer–carrier combinations, energy transfer, and oxygen-related response studies. Applications: Photosensitizing and photocatalytic materials; Energy-transfer systems; Phosphorescence and oxygen-related response studies. Customization available.