Safranin O Certified C.I. 50240


Safranine O is a dark green crystalline powder and is commonly used as a counterstain, classically in the Gram method. It can also be used to demonstrate cartilage, mucin and mast cell granules.

  • Used as a counterstain

Certified C.I. 50240
Dye Content: >95%
Molecular Formula: C20H19ClN4
Molecular Weight: 350.85 g/mol
Maxium Absorptivity (in 50:50 Ethanol:Water): 530nm
Absorptivity (E1%in1cm cell Ethanol:Water): 1562
Loss on drying: <3.52%

Hazard Phrazes: Causes serious eye damage.

Prec Phrazes: 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. Get medical advice/attention.

Cas No: 477-73-6
Einecs No: 207-518-8

Additional information

Weight N/A
Pack Size

5g, 10g, 25g, 50g, 100g, 1Kg