Azure A

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
Azure A
Azure A
Methylene azure A
52005

Thiazin
Basic
Soluble
Sparingly
625-632 (Conn)
633 (Aldrich)
620-634 (Merck)
632 (Gurr)
Blue
C14H14N3SCl
291.8

Azure A is formed by the oxidation of Methylene blue and is strongly metachromatic. It is used in making azure eosin stains for blood smear staining. Compare the formulae of the three azures and methylene blue.

 

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.

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

 


 

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