Naphthol Yellow 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   Naphthol yellow S Naphthol yellow S Sulfur yellow S, Acid yellow S 10316 Acid yellow 1 Nitro Acid 8% Slightly 428, 392 (Conn) 427, 390 (Gurr) Yellow C10H4N2O8SNa2 358.2 (Aldrich, Merck), 412.254 (Conn)

This dye has been recommended by Shoobridge for use as a staining "primer" in his polychrome method. Its free acid is called flavianic acid.

 

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

Susan Budavari, Editor.
The Merck Index, 12 ed.,
Merck & Co., NJ, USA

Edward Gurr, (1971)
Synthetic dyes in biology, medicine and chemistry
Academic Press, London, England.