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Naphthol Green B

Naphthol Green B

Class: Nitroso
Ionisation: Acid

Chemical structure of Naphthol Green B

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

C.I. Number: 10020
C.I. Name: Acid green 1
Color: Green
Solubility Aqueous: Very
Solubility Ethanol: Very
Absorption Maximum: 315, 690 (Gurr), 714 (Aldrich)
Empirical Formula: (C10H5NO5SNa)3Fe
Formula Weight: 878.79

Description

This dye is a lake, in which the mordant metal is ferric iron. However, the iron appears to play no part in staining tissues. The unlaked dye is Naphthol green Y, C.I. 10005. Attachment to tissues is considered to be through the sulfonic group. The dye is therefore an acid dye, but it is rarely used for staining tissues.

The formula on the left is given by Conn, and is similar to that given by Gurr. The formula on the right is given by Aldrich.

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.
  3. Aldrich chemical catalogue, 1992
    Aldrich Chemical Company, Milwaukee, WI, USA