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Victoria Blue 4R

Victoria Blue 4R

Ionisation: Basic

Chemical structure of Victoria Blue 4R

Common Name: Victoria blue
Suggested Name: Victoria blue 4R
Other Names:

C.I. Number: 42563
C.I. Name: Basic blue 8
Color: Blue
Solubility Aqueous: 3.23%
Solubility Ethanol: 3.23%
Absorption Maximum: 593.5, 538.5 (Conn) 591 (Gurr)
Empirical Formula: C34H34N3Cl
Formula Weight: 520.1


The dyes named victoria blue are all very similar and they are sometimes confused and substituted for each other in staining solutions, often without any difference in the results. Compare this dye to its close relatives, victoria blue B, victoria blue R and night blue. If one of these three is required but is unavailable, it is worth trying one of the others as a substitute.


  1. R. D. Lillie.
    Conn’s Biological Stains
    Williams & Wilkins, Baltimore, MD., U.S.A.
  2. Edward Gurr, 1971
    Synthetic dyes in biology, medicine and chemistry
    Academic Press, London, England.