Fluorescein-O′-acetic acid N-succinimidyl ester
Fluorescein-O′-acetic acid N-succinimidyl ester (CAS: 279676-33-4; Formula: C26H17NO9; MW: 487.41) is a specialised derivative of fluorescein, commonly employed in biochemical research and diagnostics. It functions as a labelling reagent, covalently attaching a fluorescent tag to molecules of interest. This ester is particularly useful for enhancing the detectability of biomolecules in various analytical techniques, facilitating sensitive and specific detection methods.
- IUPAC
- FOAA-Su,SIFA

Fluorescent Labelling
Utilised for the covalent attachment of a fluorescein moiety to amine-containing molecules, such as proteins and peptides. This enables sensitive fluorescent detection and imaging in biological and chemical analyses.
Bioconjugation Reagent
Serves as a derivatisation agent for labelling biomolecules. The succinimidyl ester group readily reacts with primary amines under mild conditions, creating stable fluorescent conjugates.
Diagnostic Assays
Incorporated into various diagnostic platforms for enhanced sensitivity. Its fluorescent properties aid in the detection and quantification of analytes in complex biological samples.
Biochemical Research
A valuable tool in research for tracking and visualising biological processes. It facilitates studies involving protein localisation, enzyme activity, and receptor binding.
| Molecular weight | 487.41 |
|---|---|
| Empirical formula | C26H17NO9 |
| Storage temperature | −20°C |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
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 Fluorescein-O′-acetic acid N-succinimidyl ester used for?
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Fluorescein-O′-acetic acid N-succinimidyl ester is used as a fluorescent labelling reagent to covalently attach a fluorescein tag to amine-containing biomolecules, facilitating their detection and imaging in biochemical research and diagnostic applications.
What are the CAS number and formula for Fluorescein-O′-acetic acid N-succinimidyl ester?
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The CAS number is 279676-33-4 and the empirical formula (Hill notation) is C26H17NO9.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Fluorescein-O′-acetic acid N-succinimidyl ester for research purposes. The specific assay and purity are detailed on the product's Certificate of Analysis. TSS does not represent this product as USP, BP, EP or pharmaceutical grade.
How should Fluorescein-O′-acetic acid N-succinimidyl ester be handled and stored?
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Handle Fluorescein-O′-acetic acid N-succinimidyl ester with appropriate personal protective equipment, including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended. Store at −20°C.
What is the WGK Germany classification for this chemical?
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Fluorescein-O′-acetic acid N-succinimidyl ester has a WGK Germany classification of 3.
How can I request a sample or quote for Fluorescein-O′-acetic acid N-succinimidyl ester?
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To request a sample or quote for Fluorescein-O′-acetic acid N-succinimidyl ester, please contact our sales team through the website or by telephone. Provide the product name and CAS number for prompt service.
Does Tech Serve Solutions export Fluorescein-O′-acetic acid N-succinimidyl ester?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including Fluorescein-O′-acetic acid N-succinimidyl ester, serving customers worldwide.
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