The incident involved a chemical known as acryloyl chloride, which is used in the preparation of polymers. When vaporised, the substance forms, for example, hydrochloric acid. If inhaled, the substance causes severe irritation and may cause mucosal lesions.
The chemical had been in storage for a long time, and the cause of the container being broken is not known. The whole building was evacuated as soon as the leak was discovered, and remained evacuated for approximately three hours, after which all those except those working in the immediate vicinity of the leak could return to their work facilities
Professor Tomi Mäkelä, Director of Biomedicum
Tel. 050 528 6128