Description

Texas Red-X Succinimidyl Ester is a reactive, amine-reactive fluorescent dye derivative used for labeling proteins, peptides, antibodies, and other biomolecules. This compound is essential for creating highly sensitive and stable fluorescent conjugates for advanced detection and imaging applications. It is primarily needed by researchers and manufacturers in the fields of bioconjugation, flow cytometry, fluorescence microscopy (FLIM), and in vitro diagnostics (IVD).

Application

• Protein and Antibody Labeling: Covalent conjugation to primary amines (lysine residues) for fluorescence-activated cell sorting (FACS) and immunofluorescence.
• Biomolecular Probes: Synthesis of fluorescent probes for tracking cellular processes, receptor binding studies, and enzyme activity assays.
• Diagnostic Assay Development: Key reagent for developing fluorescent immunoassays (e.g., ELISA, lateral flow tests) and molecular diagnostic kits.
• Microscopy and Imaging: Preparation of labeled specimens for confocal, super-resolution, and fluorescence lifetime imaging microscopy (FLIM).
• Nucleic Acid Labeling: Modification of amine-modified oligonucleotides for fluorescence in situ hybridization (FISH) and genomic applications.
• Material Science: Surface functionalization of nanoparticles and polymers for bioimaging and targeted delivery systems.

Basic Information

Product Name	Texas Red-X Succinimidyl Ester
CAS No.	178623-11-5
Molecular Formula	C37H39N3O8S2
Molecular Weight	717.85 g/mol
Synonyms	Sulforhodamine 101 sulfonyl chloride, succinimidyl ester; Texas Red®-X, SE; Texas Red®-X succinimidyl ester; 5-(and-6)-((N-(5-Aminopentyl)amino)carbonyl)-3(or 4)-((2,5-dioxo-1-pyrrolidinyl)oxy)-3-oxopropyl)sulfonyl)-2-sulfopropylamino)-6-amino-3H-xanthen-3-ylidene)-1,3-benzenedisulfonate; Texas Red™-X NHS Ester; Sulforhodamine 101 acid chloride, mixed with N-hydroxysuccinimide ester
EINECS	Contact for details

Quality Control

Our Texas Red-X Succinimidyl Ester is manufactured under strict quality systems. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets the high standards required for sensitive life science research and in vitro diagnostic use. Certificates of Analysis (COA) with detailed specifications are provided for every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store desiccated at -20°C or below. This product is hygroscopic (moisture-sensitive) and light-sensitive. Allow the vial to equilibrate to room temperature in a desiccator before opening to minimize moisture uptake.

Specification

Item	Specification
Appearance	Dark red to purple solid
Identification (HPLC/UV-Vis)	Conforms
Purity (HPLC)	≥ 90%
Absorption (λmax)	~588 nm
Emission (λmax)	~603 nm
Extinction Coefficient (ε)	~1.0 x 105 cm-1M-1
Solubility	Soluble in DMSO, DMF, acetonitrile
Water Content (KF)	≤ 2.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.