This New York Times story about the use of formaldehyde by embalmers is worth reading by pathologists and histotechnologists. http://www.nytimes.com/2011/07/21/business/despite-cancer-risk-embalmers-stay-with-formaldehyde.html?_r=1&hp Seems like they've basically got the right idea. Bob Richmond Samurai Pathologist Knoxville TN