Night Blue

Property Data
Common name
Suggested name
Other names
C.I. number
C.I. name
Class
Ionisation
Solubility aqueous
Solubility ethanol
Absorption maximum
Colour
Empirical formula
Formula weight
Night blue
Night blue

44085
Basic blue 15
Triarylmethane
Basic
Readily
Readily
616 (Gurr)
Blue
C38H42N3Cl
576.2

Night blue has been recommended as a substitute for basic fuchsin in the demonstration of acid fast organisms, which would be coloured blue instead of red. While this dye is effective for that purpose, small blue organisms on a red background are not as easily seen as small red organisms on a blue background, and the method has gained very little favour.

Compare this dye to its close relatives, victoria blue 4R, victoria blue B and victoria blue R. If one of these dyes is required but is unavailable, it is worth trying one of the others as a substitute.

 

Reference
R. D. Lillie.
Conn's Biological Stains
Williams & Wilkins, Baltimore, MD., U.S.A.

Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.

 


 

Translate in
Google Translate
Instructions