Description

Ethyl Eosin is a synthetic xanthene dye belonging to the eosin family, known for its distinctive red fluorescence. This compound is a vital biological stain and diagnostic reagent, prized for its high purity and consistent performance in critical applications. It is primarily used by manufacturers and research laboratories in the life sciences, histology, and diagnostic industries for staining cellular structures and as a component in various assay kits.

Application

• Histological Staining: A key counterstain in hematoxylin and eosin (H&E) protocols for visualizing cytoplasm, collagen, and muscle fibers in tissue sections.
• Microbiological Staining: Used in differential staining techniques to identify and characterize bacteria and other microorganisms.
• Fluorescence Microscopy: Employed as a fluorescent tracer or tag in cellular imaging and viability assays due to its red emission.
• Diagnostic Reagents: A component in prepared stains, kits, and solutions for clinical pathology and laboratory diagnostics.
• Ink and Dye Formulations: Used in the production of specialized inks, including red inks and biological markers.
• Research & Development: Serves as a model compound or reagent in photochemical, biochemical, and analytical research.

Basic Information

Product Name	Ethyl Eosin
CAS No.	6359-05-3
Molecular Formula	C22H14Br4Na2O5
Molecular Weight	691.86 g/mol
Synonyms	Eosin Y, Ethyl Eosin; Eosin Yellowish; Acid Red 87; C.I. 45380; Bromoeosin; 2',4',5',7'-Tetrabromofluorescein disodium salt; Eosin Y, water soluble; Eosin Yellow
EINECS	228-781-8

Quality Control

Our Ethyl Eosin is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including identity confirmation by IR spectroscopy, purity assessment by HPLC, and verification of key physical properties to ensure it meets the high standards required for biological staining and diagnostic use. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at a controlled room temperature (15-25°C). Keep the container tightly sealed to protect from moisture.

Specification

Item	Specification
Appearance	Red to brownish-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	Min. 85% (Dye content)
Loss on Drying	Max. 5.0%
Absorbance (λ max)	515 - 520 nm
Solubility (in Water)	Freely soluble, clear red solution
pH (1% Solution)	7.0 - 9.0

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