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Acid Fuchsin

Acid Fuchsin

Ionisation: Acid

Chemical structure of Acid Fuchsin

Common Name: Acid fuchsin
Suggested Name: Acid fuchsin
Other Names:

Acid magenta Acid rubin Acid roseine

C.I. Number: 42685
C.I. Name: Acid violet 19
Color: Red
Solubility Aqueous: 14%
Solubility Ethanol: 14%
Absorption Maximum: 540-546
Empirical Formula: C20H17N3Na2O9S3
Formula Weight: 585.6


Acid fuchsin is made from basic fuchsin homologues by the addition of sulfonic groups. There are four of these compounds, each of which could have up to three sulfonic groups attached, making twelve possible chemicals. Although there may be slight differences in their properties they are all satisfactory. Commercial Acid fuchsin is probably a variable mixture.

It is used in the Van Gieson method in conjunction with picric acid to demonstrate collagen fibers red and in Masson's trichrome to color smooth muscle in contrast to collagen. It is less commonly used in a method for mitochondria.


  1. R. D. Lillie.
    Conn’s Biological Stains
    Williams & Wilkins, Baltimore, MD., U.S.A.
  2. Edward Gurr, 1971
    Synthetic dyes in biology, medicine and chemistry
    Academic Press, London, England.