formalina - 40% formaldehyde - Euromex The formaldehyde is one of the most important basic organic compounds of the chemical industry. Formerly used a dissolution of 35% of formaldehyde in water as a disinfectant. In the currently used for the preservation of biological samples and fresh corpses, usually in a 5% Dilution in water. It should be noted that the formaldehyde to be used in medicine must be stabilised with methanol, and have to temperatures not to exceed the 300 degrees, since this temperature begins the process of auto ignition. In addition the formaldehyde for conservation of fatty tissues, such as the brain, but are not working to 10% to 40% as in this case. Information from Wikipedia
