6-Carboxy-X-rhodamine N-succinimidyl ester
6-Carboxy-X-rhodamine N-succinimidyl ester (CAS: 216699-36-4) is a rhodamine derivative with the molecular formula C37H33N3O7 and a molecular weight of 631.67 g/mol. This fluorescent label is suitable for fluorescence applications and is commonly used in biochemical research. It functions as a reactive dye for labelling biomolecules, enabling detection and visualisation in various biological assays and microscopy techniques.

Fluorescent Labelling
6-Carboxy-X-rhodamine N-succinimidyl ester is utilised for covalent labelling of primary amine-containing biomolecules, such as proteins and antibodies. Its fluorescent properties facilitate detection in immunoassays and imaging applications.
Biochemical Assays
This compound serves as a fluorescent probe in various biochemical assays. It can be employed to study molecular interactions and to track biological processes where fluorescent detection is required.
Microscopy and Imaging
The fluorescent nature of 6-Carboxy-X-rhodamine N-succinimidyl ester makes it suitable for fluorescence microscopy, enabling visualisation of labelled structures within cells or tissues.
| Molecular weight | 631.67 |
|---|---|
| Empirical formula | C37H33N3O7 |
| Storage temperature | −20°C |
| Suitability | in accordance for fluorescencesuitable for fluorescence |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Product Line | BioReagent |
|---|
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 6-Carboxy-X-rhodamine N-succinimidyl ester used for?
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6-Carboxy-X-rhodamine N-succinimidyl ester is used as a fluorescent label for biomolecules, particularly for conjugating to molecules with primary amine groups. It is employed in biochemical assays, fluorescence microscopy, and general detection applications.
What are the CAS number and formula for 6-Carboxy-X-rhodamine N-succinimidyl ester?
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The CAS number is 216699-36-4 and the empirical formula is C37H33N3O7.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 6-Carboxy-X-rhodamine N-succinimidyl ester suitable for research and fluorescence applications. Specific assay and purity information is available on the product's Certificate of Analysis. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeial grade.
How should 6-Carboxy-X-rhodamine N-succinimidyl ester be handled safely?
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Handle with appropriate personal protective equipment, including eyeshields, gloves, and a dust mask (type N95 or equivalent). Avoid inhalation of dust and contact with skin and eyes. This compound may cause skin irritation (H315), serious eye irritation (H319), and respiratory irritation (H335).
Is 6-Carboxy-X-rhodamine N-succinimidyl ester a controlled substance?
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Based on the provided data, 6-Carboxy-X-rhodamine N-succinimidyl ester is not listed as a controlled substance.
How is 6-Carboxy-X-rhodamine N-succinimidyl ester shipped?
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6-Carboxy-X-rhodamine N-succinimidyl ester is typically stored at -20°C and shipped according to standard chemical handling protocols for temperature-sensitive reagents.
How can I request a quote or sample?
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To request a quote or sample of 6-Carboxy-X-rhodamine N-succinimidyl ester, please contact the Tech Serve Solutions sales department via our website or by telephone.
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