[Contact eczema caused by 1,4-bis-chloromethylbenzene].

Approximately 3 days of contact to 1,4-bis-chloromethylbenzene of a 24-year old chemistry student led to a bullous contact eczema within approx. 10 days. Patch tests with the substance proved definitely positive. A weak reaction also occurred with 1,4-bis-mercaptomethylbenzene, for the synthesis of which the chloromethyl derivative had been synthesized.