Alizarin Red S

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
Alizarin red S
Alizarin red S
Alizarin
Alizarin carmine
58005
Mordant red 3
Anthraquinone
Acid
7.7%
0.15%
557, 594-9 (Conn)
423, 546 alkaline (Gurr)
556, 596 (Aldrich)

C14H7O7SNa
342.3

Alizarin red S is sometimes used to demonstrate calcium in sections. Unlike the more commonly used method for calcium, the von Kossa, it combines with the calcium ions forming a bright red lake. It is commonly used to stain embryo skeletons in cleared whole mounts, usually of small mammals. Although sometimes simply called alizarin, it should be noted that another dye, from which it is derived by sulphonation, is more properly called by that name.

 

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.

 


 

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