Orcein Synthetic


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

HS CODE: 3212900000


Following the UK’s departure from the EU on 1 January 2021, all European shipments are sent on a DAP Basis (Delivered at Place).

This means that the buyer will be liable for import VAT at their prevailing national rate and for orders over 150€ (including carriage) import duties will become chargeable at your prevailing national rate.

The Duty is ascertained by your national customs authority based on the HS Code of each product. The HS Code is shown in the “European Shipment” section of each product page.


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5gm, 10gm, 25gm, 50gm