Sudan II (C.I. 12140), for microscopy, 5 g, glass

Sudan II (C.I. 12140) is a lipophilic azo dye supplied for microscopy, identified by CAS number 3118-97-6 and the empirical formula C₁₈H₁₆N₂O. With a molar mass of 276,34 g/mol, a density of 0,47 g/cm³, a flash point of 213,6 °C and a boiling point of 300 °C, it offers well-defined physicochemical data for laboratory staining work. The dye is Sudan II belongs to the classic Sudan series of fat-soluble colourants used to highlight neutral lipids and related structures in fixed specimens. This grade from manufacturer Carl ROTH is intended for microscopy applications where consistent dye identity and documented physical constants support reproducible preparation of staining solutions. Laboratories can integrate the material into established fat-staining workflows, microtechnique teaching sets, or method development that relies on C.I. 12140. The compact glass pack supports controlled dispensing and storage within standard chemical inventories for dyes and pigments used in biological imaging.

Key features

• Appearance: orange red powder
• Appearance of solution (1 % in CHCl3): orange to red
• CAS number: 3118-97-6
• Pack sizes: 5 g, 25 g, 100 g
• Empirical formula: C₁₈H₁₆N₂O
• Molar mass: 276,34 g/mol
• Density: 0,47 g/cm³
• Technical Information Sheet:
• Safety Data Sheet: