Alkyne MegaStokes dye 735
Alkyne MegaStokes dye 735 (CAS: 1246853-79-1) is a fluorescent dye with the molecular formula C24H26N2O4S and a molecular weight of 438.54 g/mol. Characterised by its excitation at 586 nm and emission at 735 nm in ethanol, this pyridinium inner salt derivative is primarily used as a fluorescent label and probe in chemical biology and conjugation chemistry. Its specific spectral properties make it valuable for various research and analytical applications requiring red-shifted fluorescence.
- IUPAC
- 4-{2-[6-(Diethylamino)-2-benzofuranyl]ethenyl}-1-(4-pentyn-1-yl)-3-sulfo-pyridinium inner salt

Fluorescent Labeling
Utilised as a fluorescent label, Alkyne MegaStokes dye 735 can be incorporated into biomolecules or materials for imaging and detection purposes. Its red emission is beneficial for reducing background fluorescence and enabling multiplexing in biological assays.
Chemical Biology Research
This dye serves as a valuable tool in chemical biology for studying cellular processes and molecular interactions. Its alkyne functionality allows for bioorthogonal conjugation via click chemistry.
Conjugation Chemistry
The presence of an alkyne group makes this compound suitable for click chemistry reactions, enabling covalent attachment to azide-modified substrates. This is key for creating novel fluorescent conjugates and probes.
Fluorescent Probes
Alkyne MegaStokes dye 735 can be employed in the development of specialised fluorescent probes for advanced imaging techniques. Its spectral characteristics are advantageous for in-situ cellular analysis and diagnostics.
| Molecular weight | 438.54 |
|---|---|
| Empirical formula | C24H26N2O4S |
| Storage temperature | −20°C |

Hazard statements
- H315Causes skin irritation
| Water hazard class (WGK, DE) | 3 |
|---|---|
| Hazard codes (EU) | Xi |
| Risk statements (R) | 38 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Fluorescence | λex 586 nm; λem 735 nm in ethanol |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Alkyne MegaStokes dye 735 used for?
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Alkyne MegaStokes dye 735 is used as a fluorescent label and probe in chemical biology and conjugation chemistry, with applications in fluorescent labeling and the development of fluorescent probes.
What is the CAS number and formula for Alkyne MegaStokes dye 735?
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The CAS number is 1246853-79-1 and the empirical formula (Hill notation) is C24H26N2O4S.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Alkyne MegaStokes dye 735 for research and laboratory use. The specific grade and purity are available upon request; TSS does not represent this product as USP, BP, EP, or any other pharmacopoeial grade.
How should Alkyne MegaStokes dye 735 be handled safely?
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Alkyne MegaStokes dye 735 is classified as a Warning substance, causing skin irritation (H315). Handle with appropriate personal protective equipment, including gloves and eye protection, in a well-ventilated area to avoid skin contact and inhalation.
How is Alkyne MegaStokes dye 735 packed and shipped?
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Alkyne MegaStokes dye 735 is typically stored at -20°C. TSS ensures appropriate packaging and handling procedures for domestic and international export, adhering to all relevant shipping regulations for chemical compounds.
How can I request a sample or quote for Alkyne MegaStokes dye 735?
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To request a sample or a quotation for Alkyne MegaStokes dye 735, please contact our sales department through the website or by phone, providing your specific requirements and shipping details.
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