6401. 1-Naphthylamine-4,6-disulfonic Acid

Nomenclature

CAS number: 85-74-5
4-Amino-1,7-naphthalenedisulfonic acid; Dahl's acid II.
C10H9NO6S2; mol wt 303.31.
C 39.60%, H 2.99%, N 4.62%, O 31.65%, S 21.14%.

Description and references

Prepn by sulfonation of α-naphthylamine and separation from mixture of sulfonic acids obtained: Erdmann, Ann. 275, 192 (1893).

Chemical structure

Properties

Crystals. Sol in 6 parts cold water; very sol in hot water; sol in alcohol.