1.04120

Eosin B (bläulich) (C.I.45400)

• Synonym(e): Eosin B (bluish) (C.I.45400)
• Empirische Formel (Hill-System): C₂₀H₆Br₂N₂Na₂O₉
• CAS-Nummer: 548-24-3
• Molekulargewicht: 624.06
• MDL-Nummer: MFCD00005041
• UNSPSC-Code: 41116130

Eigenschaften

• Form: solid
• Qualitätsniveau: 200
• Zusammensetzung: Dye, ≥85% spectrophotometric assay
• pH-Wert: 6.2 (25 °C, 10 g/L in H₂O)
• Löslichkeit: 300 g/L
• Schüttdichte: 680 kg/m³
• Anwendung(en): diagnostic assay manufacturing; hematology; histology
• Lagertemp.: 2-30°C
• InChI: 1S/C20H8Br2N2O9.2Na/c21-14-16(25)11(23(29)30)5-9-13(7-3-1-2-4-8(7)20(27)28)10-6-12(24(31)32)17(26)15(22)19(10)33-18(9)14;;/h1-6,25H,(H,27,28);;/q;2*+1/p-2
• InChIKey: GYYTYUGGVBYJHE-UHFFFAOYSA-L

Beschreibung

Allgemeine Beschreibung

Eosin B (C.I. 45400) for microscopy Certistain^®, is a dry dye for microscopy that is often used as a counterstain, vizualising proteins, connective tissues, fibers and keratin in sample material of human origin. Depending on user requirements and personal preferences, it can be used for the preparation of the commonly used aqueous or alcoholic Eosin B staining solutions. This staining solution will mostly be used for routine staining in the hematoxylin-eosin staining process (H&E). The H&E staining process is the most frequently used staining method for histological material. Due to the hematoxylin solution, the nuclei will appear dark blue to dark violet in color and the Eosin Y solution will stain the cytoplasma and intercellular substances pink to red.
As the dye belongs to the portfolio of Certistain^® dyes, it is chemically analyzed according to strict specifications before release and a high staining quality, with reliable staining results is guaranteed.

Anwendung

for microscopy Certistain^®

Hinweis zur Analyse

Dye content (gravimetrically): = 85%
Identity

• sodium: passes test
• UV/VIS−Spectrum: passes test

Absorption maximum λ_max (water): 517 - 525 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.005 gl; water): 800/1000
TLC-Test: passes test
Loss on drying (110 °C): ≤ 8%
Suitability for microscopy: passes test

Rechtliche Hinweise

CERTISTAIN is a registered trademark of Merck KGaA, Darmstadt, Germany

Sicherheitshinweise

• Lagerklassenschlüssel: 11 - Combustible Solids
• WGK: WGK 3
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable