Skip to main content
search

Azocarmine

Dye

Azocarmine

Class: Quinone-imine
Ionisation: Acid


Common Name: Azocarmine G
Suggested Name: Azocarmine G
Other Names:

–

C.I. Number: 50085
C.I. Name: Acid red 101
Color: Red
Solubility Aqueous: Moderate
Solubility Ethanol: Moderate
Absorption Maximum: 510 (Gurr)
Empirical Formula: C28H18N3O6S2Na
Formula Weight: 579.6

Description

These dyes are often substituted for each other. Azocarmine without any B or G designation is sometimes all that is given as identification. In most cases, either can be used. It has been specified as the plasma stain in some trichrome methods. It should be noted that neither is an azo dye and neither has any relationship to carmine.

Since azocarmine B is more soluble in water than azocarmine A, the former may be a preferable choice.

References

  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.