2-Naphthylamine-5-sulfonic Acid
Title: 2-Naphthylamine-5-sulfonic Acid
CAS Registry Number: 81-05-0
CAS Name: 6-Amino-1-naphthalenesulfonic acid
Additional Names: Dahl's acid
Molecular Formula: C10H9NO3S
Molecular Weight: 223.25
Percent Composition: C 53.80%, H 4.06%, N 6.27%, O 21.50%, S 14.36%
Literature References: Prepn by reduction of 6-nitro-1-naphthalenesulfonic acid: Kappeler, Ber. 45, 633 (1912); by sulfonation of b-naphthylamine and separation from mixt of sulfonic acids obtained: Green, Vakil, J. Chem. Soc. 113, 35 (1918).
Properties: Needles from water. Sol in 3025 parts water at 20°. Almost insol in alcohol.
Use: Dyestuff intermediate.

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