Dear All Not so much a rad question as such. I know that Co-60 metal is insoluble in water (lets say pure distilled water).. What I wonder is if anyone has any data on what the solubility is - how ever small it may be? I had a statistic of 1mg/dm cubed / day (that seems a lot if you had a few 1000 TBq ? Cheers Mark http://ionactiveweb.adflix.com/IonActive_Forum/index.php