You may want to check out some of the published guidelines for Ethidium Bromide Disposal (see also Google): http://web.princeton.edu/sites/ehs/chemwaste/etbr.html > .. I have contaminated all my clothes - Don -- -- d.gilbert--bioinformatics--indiana-u--bloomington-in-47405 -- gilbertd at indiana.edu--http://marmot.bio.indiana.edu/