Pyronin B

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
 
Pyronin B
Pyronin B

45010

Pyronin
Basic
Very
Readily
555 (Conn)
553 (Aldrich)
550 (Gurr)
Red
C21H27N2OCl
359 (Conn, Merck, Gurr)
1042.3 (Aldrich)

Pyronin B is sometimes substituted for pyronin Y in the Unna-Pappenheim stain for nucleic acids. According to Merck the dye is supplied as a complex with ferric chloride. This probably accounts for the difference in formula weights given by Conn compared to that of Aldrich.

 

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

Susan Budavari, Editor, (1996)
The Merck Index, Ed. 12
Merck & Co., Inc., Whitehouse Station, NJ, USA

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

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