6386. 1-Naphthol-4,8-disulfonic Acid

Nomenclature

CAS number: 117-56-6
4-Hydroxy-1,5-naphthalenedisulfonic acid; α-naphtholdisulfonic acid S; Sch"ollkopf's acid.
C10H8O7S2; mol wt 304.30.
C 39.47%, H 2.65%, O 36.80%, S 21.07%.

Description and references

Prepd by sulfonation of 1-naphthol-8-sulfonic acid sultone: I. G. Farbenindustrie, PB 74197, frames 828-829.

Chemical structure

Properties

Crystals. Soluble in water. The sodium salt is very soluble in water.