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CAS: 17372-87-1
Molecular Formula: C20H6Br4Na2O5
Molecular Weight: 691.85418
EINECS: 241-409-6
HS Code: 32041200
Synonyms: Disodium 2-(2,4,5,7-tetrabromo-6-oxido-3-oxoxanthen-9-yl)benzoate; Water Red 2; Eosin Disodium; AKA230(1); AKA230(2); Eosin Y, Indicator Grade; Eosin Y, 5 wt.% Solution in Water; Eosin Y Disodium Electrophoresis Reagent
Eosin Disodium (CAS 17372-87-1), also known as Eosin Y Disodium Salt, is a xanthene-based fluorescent dye and staining reagent. It is a sodium salt derivative of tetrabromofluorescein and appears as a reddish solid powder.
Due to its strong fluorescent properties and staining ability, Eosin Disodium is widely used in biological staining, histology, laboratory research, and fluorescent labeling applications. It is commonly used together with hematoxylin in H&E staining to identify cellular structures such as cytoplasm, muscle, and collagen.
Eosin Disodium is also applied in dye manufacturing, cosmetic coloring, fluorescent probes, and research applications involving protein labeling and molecular detection.
| Property | Value |
| Appearance | Brownish-red powder / Reddish solid |
| Melting Point | >300 °C |
| Density | 1.02 g/mL at 20 °C |
| pH | 9.2 (10 g/L, H2O, 20 °C) |
| Solubility | Freely soluble in water |
| Storage Conditions | Store at RT / +4 °C |
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At Mikem, our advanced factory and laboratory form the foundation of our chemical production excellence. Equipped with modern manufacturing lines and precision testing instruments, we ensure every product meets strict international standards for quality, safety, and performance.
Our R&D laboratory, staffed by experienced chemists and engineers, drives continuous innovation— developing high-performance chemical solutions tailored to diverse industries. From raw material analysis to final product inspection, we maintain full traceability and consistency.
