Sirius Red 4B

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
Sirius red 4B
Sirius red 4B
Chlorantine fast red 5B
28160
Direct red 81
Azo
Acid
Moderate
Slight
508 (Aldrich), 502 (Gurr)
Red
C29H19N5O8S2Na2
675.62

Sirius red 4B has been recommended as the plasma stain in some trichrome staining methods, or as a substitute for acid fuchsin in the van Gieson.

It is sometimes confused with the similarly named dye, sirius red F3B, which may be used for demonstrating amyloid. Sirius red 4B is not used for that purpose and is not a substitute for congo red.

 

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

Aldrich chemical catalogue, 1992
Aldrich Chemical Company, Milwaukee, WI, USA.

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

 


 

 

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