>> As I said on my original post, read the MSDS for H2O ;-) Don't need to. I've seen the simplified information from the "ban di-hydrogen monoxide" group. I've even sung the song! http://www.ogauge.co.uk/DHMO.html BillW -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.