 <unk> skin contact with antimony dust may cause <unk> . However , it was agreed at the European Union level that the skin <unk> observed are not substance @-@ specific , but most probably due to a physical blocking of <unk> <unk> ( <unk> / PR / 09 / 09 , Helsinki , 6 July 2009 ) . Antimony dust may also be explosive when dispersed in the air ; when in a bulk solid it is not <unk> . 
