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Guinee Green B

Dye

Guinee Green B

Class: Triarylmethane
Ionisation: Acid

Chemical structure of Guinee Green B

Common Name: Guinee green
Suggested Name: Guinee green B
Other Names:

–

C.I. Number: 42085
C.I. Name: Acid green 3
Color: Green
Solubility Aqueous: 3% (Aldrich) Readily (Gurr)
Solubility Ethanol: 3% (Aldrich) Readily (Gurr)
Absorption Maximum: 618
Empirical Formula: C37H35N2O6S2Na2
Formula Weight: 713.8

Description

Guinee green is an acid dye that is occasionally mentioned as a replacement for light green SF in Masson's trichrome. The dye's major drawback is that it fades. A substitute which is less prone to fading is Fast green FCF, a closely related dye.

In the past this dye was used as a food colouring, but is no longer approved for that purpose in the United States.

Light Green Homologue

The following three green dyes may all be used as the fibre stain in Masson type procedures. Light green SF yellowish is the most common, although fast green FCF is less likely to fade and is a more brilliant colour. Guinee green is occasionally suggested, but is prone to fading.

References

  1. Susan Budavari, Editor, (1996)
    The Merck Index, Ed. 12
    Merck & Co., Inc., Whitehouse Station, NJ, USA
  2. Edward Gurr, (1971)
    Synthetic dyes in biology, medicine and chemistry
    Academic Press, London, England.
  3. Floyd J. Green, (1990)
    The Sigma Aldrich Handbook of Stains, Dyes and Indicators
    Aldrich Chemical Co., Milwaukee, WI, USA