Eosin B for microscopy, Sigma-Aldrich®
Supplier: SIGMA-ALDRICH MICROSCOPY
Synonyms:
Eosin bluish, 2,7-Dinitro-4,5-dibromofluorescein, Eosin B disodium salt, Sodium 2-(4,5-dibromo-2,7-dinitro-6-oxido-3-oxo-3H-xanthen-9-yl)benzoate, 2-(4,5-dibromo-3,6-dihydroxy-2,7-dinitroxanthen-9-yl)-benzoic acid disodium salt, Acid Red 91
M-Clarity™ quality level = MQ100
45260-100G-F
45260-25G-F
45260-100G-FEA
269
GBP
45260-100G-F
45260-25G-F
Eosin B for microscopy, Sigma-Aldrich®
Eosin B
Formula:
C₂₀H₆Br₂N₂Na₂O₉ MW: 624,06 g/mol Melting Pt: > 310 °C Storage Temperature: Ambient |
MDL Number:
MFCD00005041 CAS Number: 548-24-3 EINECS: 208-943-1 Merck Index: 12,03638 |
Specification Test Results
Appearance (colour) | Green to very dark green and brown to very dark brown and green-brown and brown-green |
Appearance (form) | Powder |
Assay (gravimetr.) | ≥ 80.0 % |
Thin layer chromatography | Corresponds to standard |
Solubility (color) | Red to very dark red |
Solubility (method) | 0.01 g in 10ml water |
Loss on drying | ≤ 7.0 % |
Infrared spectrum | Conforms to structure |
Wavelength (1) (uv) | 509 - 524 nm |
Extinction (1%/1cm) (1) (uv) | ≥ 600 |
Solvent (uv) | Water + 1ml 1% sodium carbonate |
Lead (Pb) by Element analysis | Not detected |
Zinc (Zn) by Element analysis | Not detected |
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