Fluorescein-5-thiosemicarbazide
Fluorescein-5-thiosemicarbazide (CAS 76863-28-0) is a fluorescent compound with the molecular formula C21H15N3O5S and a molecular weight of 421.43 g/mol. It is particularly suitable for fluorescence applications, exhibiting excitation at 492 nm and emission at 516 nm. This chemical is a valuable reagent in various analytical and biochemical research contexts where fluorescent detection is required.

Fluorescent Labeling
Fluorescein-5-thiosemicarbazide can be employed as a fluorescent label in biological and chemical assays. Its fluorescent properties allow for the detection and quantification of target molecules.
Analytical Standards
This compound serves as an analytical standard in chromatography and other analytical techniques. Its well-defined spectral properties make it useful for calibration and method development.
Biochemical Research
As a biochemical reagent, it finds application in studies requiring fluorescent probes for detecting specific cellular components or processes. Its suitability for fluorescence is a key attribute in this field.
| Molecular weight | 421.43 |
|---|---|
| Empirical formula | C21H15N3O5S |
| Assay | ~80% (HPCE) |
| Solubility | DMF: solubleH2O: soluble |
| Storage temperature | −20°C |
| Suitability | suitable for fluorescence |
| 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.
| Fluorescence | λex 492 nm; λem 516 nm in 0.1 M Tris pH 9.0 |
|---|
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-5-thiosemicarbazide used for?
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Fluorescein-5-thiosemicarbazide is used as a fluorescent label, an analytical standard in chromatography, and a reagent in biochemical research, particularly where fluorescent detection is required.
What are the CAS number and formula for Fluorescein-5-thiosemicarbazide?
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The CAS number is 76863-28-0 and the empirical formula is C21H15N3O5S.
What grade and purity does Tech Serve Solutions supply for Fluorescein-5-thiosemicarbazide?
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Tech Serve Solutions supplies Fluorescein-5-thiosemicarbazide with an assay of approximately 80% (HPCE). TSS does not represent this product as USP, BP, EP or other pharmacopoeia grades.
What safety precautions should be taken when handling Fluorescein-5-thiosemicarbazide?
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When handling Fluorescein-5-thiosemicarbazide, personal protective equipment including eyeshields and gloves is recommended. A type N95 (US) or type P1 (EN143) respirator filter should be used. The product has a WGK Germany rating of 3.
How is Fluorescein-5-thiosemicarbazide typically supplied and exported?
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Fluorescein-5-thiosemicarbazide is supplied suitable for fluorescence and is stored at -20°C. Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals.
How can I request a sample or quote for Fluorescein-5-thiosemicarbazide?
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To request a sample or a quote for Fluorescein-5-thiosemicarbazide, please contact our sales team through the website or by telephone.
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