Purpurin

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
Purpurin
Purpurin
Alizarin purpurin
58205 & 75410
Natural red 8 & 16
Anthraquinone
Acid
Soluble at boiling
Soluble
486, 521 (Conn)
456 alcohol (Conn)
485, 521 (Aldrich)
Yellow (aqueous)
Red (ethanol)
C14H8O5
256.2

Purpurin is a natural dye and, along with alizarin is found in madder root (Rubia tinctorum L.), although it appears to form during storage. It is very similar to alizarin red S, and is used for much the same purpose as it also forms bright red lakes with calcium.

 

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.

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

 


 

Translate in
Google Translate
Instructions