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.