Product Description

Eosin-5-isothiocyanate is a good photosensitizer and can be used to selectively label amines. It has a quantum yield of 0.57 for singlet oxygen generation, which makes it useful for photoconversion of electron-rich materials such as diaminobenzidine (DAB) or fluorescent dyes into highly electron-dense materials for high resolution electron microscopy studies (1,2). Additionally, eosin is a good fluorescence acceptor for fluorescein (FAM), dansyl and coumarin dyes in fluorescence resonance energy transfer (FRET).

  • λExEm (pH9) = 521/544 nm
  • λµ = 95,000
  • Orange red solid soluble in DMF or DMSO
  • Store at -20°C and protect from light
  • C21H7Br4NO5S
  • MW: 704.96

1. J Cell Biol 126, 901 (1994).
2. J Cell Biol 126, 877 (1994).

MSDS (PDF): MSDS 90091


Shipment Method: Shipping and handling methods will be assessed and calculated at time of shipment based upon item(s) storage temperature conditions.

Expedited shipment may be requested at time of checkout.

Please note that products will be shipped at ambient temperature. This will not affect performance if the products are kept at the indicated temperature for long term storage. Please refer to the package insert for correct storage conditions.

More information about product handling and shelf life