Common Name: Azure A
Suggested Name: Azure A
Other Names:
Methylene azure A
C.I. Number: 52005
C.I. Name: –
Color: Blue
Solubility Aqueous: Soluble
Solubility Ethanol: Soluble
Absorption Maximum: 625-632 (Conn) 633 (Aldrich) 620-634 (Merck) 632 (Gurr)
Empirical Formula: C14H14N3SCl
Formula Weight: 291.8
Description
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 formula of the three azures and methylene blue.
References
- 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,
The Merck Index, Ed. 12
Merck & Co., Inc., Whitehouse Station, NJ, USA
