Description

Eosin Y, Bis(Tetramethylammonium Salt) is a water-soluble, anionic xanthene dye derivative, commonly supplied as a dark red to brown powder. This compound is valued for its intense fluorescence and high staining affinity, making it a critical component in advanced diagnostic and analytical protocols. It is primarily utilized by manufacturers and research laboratories in the life sciences, histology, and industrial staining sectors for precise visualization and detection applications.

Application

• Histological Staining: A key counterstain in H&E (Hematoxylin and Eosin) procedures for cytoplasm, collagen, and muscle fiber visualization in tissue sections.
• Fluorescence Microscopy & Assays: Used as a fluorescent probe or tracer in cell biology and biomedical research due to its distinct emission profile.
• Viability Staining: Employed in dye exclusion tests to distinguish between live and dead cells.
• Textile & Ink Manufacturing: Serves as a colorant for specialty inks, dyes, and pigments.
• Photographic Sensitizer: Acts as a spectral sensitizer in certain photographic emulsions and photochemical applications.
• Diagnostic Reagent Formulation: Incorporated into kits and reagents for clinical diagnostics and pathology.

Basic Information

Product Name	Eosin Y, Bis(Tetramethylammonium Salt)
CAS No.	123333-96-0
Molecular Formula	C37H42N4O5
Molecular Weight	622.76 g/mol
Synonyms	Acid Red 87, Tetramethylammonium Salt; Eosin Y, Ammonium Salt; Eosin Yellowish; C.I. 45380; 2',4',5',7'-Tetrabromofluorescein, Bis(tetramethylammonium) Salt; Bromoeosine; Eosin Y water soluble
EINECS	Contact for details

Quality Control

Our Eosin Y, Bis(Tetramethylammonium Salt) is manufactured under a strict quality management system. Each batch is tested to ensure it meets high-purity standards suitable for diagnostic and research applications. Certificates of Analysis (COA) documenting identity, purity, and performance characteristics are available upon request to support your quality assurance protocols.

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 maintain stability.

Specification

Item	Specification
Appearance	Dark red to brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Absorbance (λ max)	517 - 521 nm
Fluorescence	Characteristic emission
Solubility (Water)	Freely soluble

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