Cassella's Acid
Title: Cassella's Acid
CAS Name: 7-Hydroxy-2-naphthalenesulfonic acid
Additional Names: 2-naphthol-7-sulfonic acid; b-naphthol-d-monosulfonic acid; b-naphtholsulfonic acid F; F Acid
Molecular Formula: C10H8O4S
Molecular Weight: 224.23
Percent Composition: C 53.56%, H 3.60%, O 28.54%, S 14.30%
Literature References: Prepn: Bayer, Duisberger, Ber. 20, 1426 (1887); Green, J. Chem. Soc. 55, 33 (1889).
Properties: Needles from HCl, mp 89°. Readily sol in water, alcohol; practically insol in ether, benzene.
Melting point: mp 89°
Use: Dyestuff intermediate.

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