Abstract
The stability of the diazoalkane N, N-dimethyl-4-diazomethyl benzenesulfonamide (DDBS), used as a UV-labelling agent, was investigated. The decomposition of DDBS in solvent depended mainly on the temperature and slightly on light and moisture. Thus, the decomposition in a benzene solution kept in a refrigerator and shielded from light and moisture was very slight. DDBS in solid form stored in container shielded from light was hardly decomposed in 30 weeks. DDBS has excellent stability compared with other UV-labelling agents for acidic substances.
