Orcein Synthetic


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Orcein is a red dye used in microscopy as a mordant for the staining of flagella, as well as for detecting elastic tissue in sputum,. Is also used for determination o plant or animal chromosomes.

  • Biological dye
  • Staining of Elastin in Tissue
  • Determination of chromosomes

Molecular Formula C28H24N2O7
Molecular Weight 500.51 g/mol
Absorption Ratio: 1.02 (0.98-1.15)
Wavelength of Max Absorption (NaOH 0.01mol/L): 579hm (575-580nm)
Absorbance Absorptivity A 1%1cm@lambda max: 331 (270-330)
Loss on Drying (@110 deg C): <2.0%

Hazard Phrases: Harmful if swallowed. Causes skin irritation. Causes serious eye irritation.

Prec Phrases: Wash hands thoroughly after handling. Wear protective gloves/protective clothing/eye protection/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. If eye irritation persists: Get medical advice/attention.

Cas No: 1400-62-0
Einecs No: 215-750-6


Additional information

Weight N/A
Pack Size

5gm, 10gm