1892. Cassella's Acid

Nomenclature

7-Hydroxy-2-naphthalenesulfonic acid; 2-naphthol-7-sulfonic acid; β-naphthol-δ-monosulfonic acid; β-naphtholsulfonic acid F; F Acid.
C10H8O4S; mol wt 224.23.
C 53.56%, H 3.60%, O 28.54%, S 14.30%.

Description and references

Prepn: Bayer, Duisberger, Ber. 20, 1426 (1887); Green, J. Chem. Soc. 55, 33 (1889).

Chemical structure

Properties

Needles from HCl, mp 89°. Readily sol in water, alcohol; practically insol in ether, benzene.

Use

Dyestuff intermediate.