190 Certain New Derivatives in the Aromatic Series. 



Alpha-Naphtylamine-sulphonic acid, 1 : 5, 



NH, 



\ 



SO3H 

 Alpha-Naphtylamine-sulphouic acid, 1 : 6. Bui. Soc. Chim. 26; 



U1, 



NH, 



/ 



SO3H, /, ^ 



Alpha-Naphtylamine-sulphonic acid, 1 : 7. Ber. xxi, 3264, 



NH, 



SO3H 



Beta-Naphtylamine-sulphonic acid, 2 : 5, the so-called Dahl's acid, 



/ 



NH, 



SO3H 



Beta-Naphtylamine-sulphonic acid, 2 : 6, the so-called Bronner's 

 acid. 



SO3H 



^NH, 



