Title:  1-Naphthylamine-4,6-disulfonic Acid 
CAS Registry Number:  85-74-5 
CAS Name:  4-Amino-1,7-naphthalenedisulfonic acid 
Additional Names:  Dahl's acid II 
Molecular Formula:  C10H9NO6S2 
Molecular Weight:  303.31 
Percent Composition:  C 39.60%, H 2.99%, N 4.62%, O 31.65%, S 21.14% 
Literature References:  Prepn by sulfonation of a-naphthylamine and separation from mixture of sulfonic acids obtained:  Erdmann, Ann. 275, 192 (1893). 
Properties:  Crystals.  Sol in 6 parts cold water; very sol in hot water; sol in alcohol.   |