Dihydrorhodamine 123
Dihydrorhodamine 123 (CAS: 109244-58-8, Formula: C21H18N2O3) is a fluorescent probe with a molecular weight of 346.38 g/mol. This powder form compound exhibits good solubility in DMSO. It is primarily utilised in biological research as a substrate for enzyme activity detection and as a fluorescent stain for cell-based assays, aiding in the visualisation and quantification of cellular processes. Its fluorescent properties make it valuable in various imaging and flow cytometry applications.

Enzyme Activity Detection
Dihydrorhodamine 123 serves as a sensitive substrate for certain enzymes, producing a fluorescent signal upon enzymatic cleavage. This allows for the detection and quantification of enzyme activity in biological samples.
Cellular Staining and Imaging
As a fluorescent probe, it can be used to stain cells, enabling visualisation of cellular structures or processes under fluorescence microscopy. Its properties are particularly useful in flow cytometry for cell analysis.
Biochemical Research
This compound is employed in biochemical investigations to study enzyme kinetics, cellular metabolism, and other biological phenomena where fluorescence-based detection is advantageous.
| Molecular weight | 346.38 |
|---|---|
| Empirical formula | C21H18N2O3 |
| Assay | ≥95% |
| Form | powder |
| Solubility | DMSO: >5 mg/mL |
| 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 Dihydrorhodamine 123 used for?
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Dihydrorhodamine 123 is used as a fluorescent substrate for enzyme activity detection and as a fluorescent stain in cell biology, particularly in flow cytometry and microscopy applications.
What is the CAS number and formula for Dihydrorhodamine 123?
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The CAS number for Dihydrorhodamine 123 is 109244-58-8, and its molecular formula is C21H18N2O3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Dihydrorhodamine 123 with an assay of ≥95%. We do not represent this product as meeting USP, BP, EP, or other pharmacopoeia standards.
How should Dihydrorhodamine 123 be handled and stored?
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Handle Dihydrorhodamine 123 with appropriate personal protective equipment, including eyeshields and gloves, and use a P1 (EN143) or N95 (US) respirator filter. Store at -20°C.
Is Dihydrorhodamine 123 a controlled substance?
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The provided data does not indicate that Dihydrorhodamine 123 is a controlled substance.
How is Dihydrorhodamine 123 packed and shipped?
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Dihydrorhodamine 123 is supplied as a powder and is packed and shipped according to standard chemical handling procedures. Tech Serve Solutions is a global supplier and exporter.
How can I request a quote or sample for Dihydrorhodamine 123?
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To request a quote or sample of Dihydrorhodamine 123, please contact our sales team through the TSS website or your dedicated account manager.
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