sodium naphthionate

sodium naphthionate

[′sōd·ē·əm naf′thī·ə‚nāt]
(organic chemistry)
NaC10H6(NH2)SO3·4H2O White, light-sensitive crystals, soluble in water and insoluble in ether; used in analysis (Riegler's reagent) for nitrous acid.
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References in periodicals archive ?
Sodium naphthionate (3) was connected with diazo of benzidine (2) at low temperature, which was maintained throughout the completion of coupling reaction.