Description

Eosin Y Bis(Tetrabutylammonium Salt) is a water-soluble, anionic xanthene dye derivative, specifically formulated as a tetrabutylammonium salt to enhance its solubility in organic media and improve its utility in specialized applications. This compound is valued for its strong fluorescence and high extinction coefficient, making it an essential component in advanced analytical and diagnostic systems. It is primarily required by research institutions, diagnostic kit manufacturers, and industrial laboratories engaged in fluorescence-based detection, histology, and material science.

Application

• Fluorescent Staining in Histology & Cytology: Used as a counterstain in H&E (Hematoxylin and Eosin) and other staining protocols for biological tissue sections.
• Biomedical Research & Diagnostics: Acts as a fluorescent probe or tracer in cell viability assays, flow cytometry, and fluorescence microscopy.
• Analytical Chemistry Reagent: Employed in spectrophotometric and fluorometric determination methods, including protein assays.
• Material Science & Photonics: Serves as a dopant or sensitizer in the development of dye-sensitized solar cells (DSSCs) and other optoelectronic devices.
• Ink & Dye Formulation: Utilized in the production of specialized inks, toners, and colorants for high-performance applications.
• Quality Control in Pharmaceuticals: Applied in trace analysis and as a standard in various chromatographic and spectroscopic methods.

Basic Information

Product Name	Eosin Y Bis(Tetrabutylammonium Salt)
CAS No.	123333-95-9
Molecular Formula	C37H59N2O5Br4 (for the salt form)
Molecular Weight	Contact for details
Synonyms	Eosin Y Tetrabutylammonium Salt; Eosin Y TBA Salt; Acid Red 87 Tetrabutylammonium Salt; 2',4',5',7'-Tetrabromofluorescein Bis(Tetrabutylammonium Salt); C.I. 45380; Bromoeosine; Eosin Y, water soluble; Eosin Yellowish
EINECS	Contact for details

Quality Control

Our Eosin Y Bis(Tetrabutylammonium Salt) is produced under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity, spectrophotometry for absorbance characteristics, and identity confirmation via IR spectroscopy, to ensure it meets the high standards required for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). The product is light-sensitive and should be handled accordingly to prevent degradation.

Specification

Item	Specification
Appearance	Red to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0 %
Absorbance Maximum (λmax)	517 - 521 nm
Fluorescence	Exhibits characteristic emission
Solubility	Soluble in water, DMSO, ethanol

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