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| Product Name | Texas Red-X Carboxylic Acid (C7-Spacer Red Rhodamine Dye) |
| Catalog No. | RERE-0003 |
| Description | Compared with the parent Texas Red structure, the Red-X version adds a seven-atom aminohexanoyl spacer between the fluorophore and the carboxyl group. The spacer lifts the dye away from its attachment point, which weakens the interaction between the fluorophore and the labelled biomolecule and preserves the conjugate's behaviour. The acid is most often converted for antibody and protein coupling, and the resulting conjugates serve cell imaging applications. |
| Intended Use | Carboxyl-handle red fluorophore for antibody and protein conjugation in cell imaging workflows. |
| Principle / Technology | The free carboxylic acid is the reactive handle: once activated it couples to primary amines, and the C7 spacer holds the fluorophore clear of the labelled molecule, reducing steric and electronic interference. |
| Detection Method | Fluorescence detection with excitation/emission of 595/615 nm. |
| Sample Type | Purple solid. |
| Performance Range / Specifications | CAS 199745-67-0; molecular formula C37H41N3O8S2; molecular weight 719.87 g/mol; appearance purple solid; purity ≥95%; Ex/Em 595/615 nm; spacer: seven-atom aminohexanoyl chain. |
| Specificity | Long-wavelength red emission with minimal overlap into green channels, suiting multi-colour imaging panels. |
| Reaction Conditions / Protocol | Activate the acid under the chosen coupling chemistry, react with the amine-bearing biomolecule, then purify the conjugate before use in imaging. |
| Components / Formulation | One vial of dye; activation reagents and buffers are not included. |
| Storage Conditions | Store at -25 to -15 °C, protected from light. |
| Shelf Life | 12 months under the recommended storage conditions. |
| Package Specifications | 5 mg |
| Product Form | Purple solid. |
| Quality Control | Released at purity ≥95%. |
| Key Features | - Seven-atom spacer keeps the dye clear of the labelled molecule - Long-wavelength red emission separates from green channels - Purity released at ≥95% - Carboxyl handle supports flexible coupling chemistry - One-year shelf life protected from light |
| Purity | ≥95% |
| Activity / Unit Definition | No unit definition; performance is defined by spectral properties and conjugation behaviour. |
| Molecular Weight | CAS 199745-67-0; molecular formula C37H41N3O8S2; molecular weight 719.87 g/mol. |
| Source / Origin | Synthetic small-molecule fluorophore, supplied as a purified solid. |
| Expiration Date / Stability | Stability is maintained by the recommended storage temperature together with continuous protection from light. |
| Regulatory / Compliance | For research use only. |
| Compatibility | Read-outs run on routine fluorescence equipment without proprietary hardware. |
| Recommended Buffer System | No buffer is included; activate and couple under the chemistry chosen by the user. |
| Application Notes / Precautions | Wear gloves when handling DMSO stocks, keep vials in the dark, and let chilled vials warm to room temperature before opening to avoid condensation. |
| Batch-to-Batch Consistency | Lot-to-lot consistency is controlled through defined manufacturing specifications; each lot ships with its release record. |
| Model Type | Carboxyl-handle fluorescent dye (acid form) |
| Starting Material / Tissue Site | Synthesised red rhodamine fluorophore carrying a C7 aminohexanoyl spacer |
| Delivery Standard | Pack size 5 mg |
| Readouts / Downstream Assays | Excitation/emission 595/615 nm on a suitable red channel. |
For research use only, not for clinical use.
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