1. 2-Amino-1-naphthyl hydrogen sulphate can be rapidly isolated from the urine of dogs dosed with 2-naphthylamine by precipitation with cetylpyridinium bromide. 2. No evidence was obtained for the presence of 2-naphthylhydroxylamine-O-sulphonic acid, noteworthy as a possible source of the carcinogens, 2-naphthylhydroxylamine and 2-amino-1-naphthol. 3. Treatment of neutral persulphate oxidations...

In the title compound, C(22)H(15)NO(3)S, the plane of the carbazole ring system forms a dihedral angle of 65.06 (4)° with the naphthalene ring system. In the crystal structure, a weak intra-molecular C-H⋯O inter-action is observed between the naphthalene ring system and the sulfonate group. Two weak inter-molecular C-H⋯O inter-actions are also observed.

Naphthyl esterase and platelet-activating factor (PAF)-acetylhydrolase activities were detected in the salivary glands of the cat flea, Ctenocephalides felis. Salivary naphthyl esterase activity is disgorged during exploratory probing. Whole extracts of salivary glands contain esterase activity against the short-chain naphthyl esters alpha-naphthyl acetate (approximately 210pmol/min/gland pair;...