Glutaraldehyde Aqueous 50%, EM Grade 10 ML, Each

Details

This EM grade aqueous glutaraldehyde, the universal fixative for electron microscopy, is assayed prior to shipping assuring consistent purity and the highest possible quality, free from polymers and other possible contaminents. Purified to EM grade from commercial grade by "all-glass vacuum-distillation". If stored properly, it has a very long shelf life. Packaged in 10 ml, single dose ampoules, sealed under dry nitrogen, and kept refrigerated until it is shipped. EM grade aqueous glutaraldehyde, stored in volumes greater than 100 ml, with repeated defrosting and recapping, will polymerize in time, producing an absorption peak of 235nm rather than the 280nm of pure EM grade. The presence of polymerized glutaraldehyde greatly reduces its efficiency as a cross-linking agent, preventing proper fixation. For this reason, we provide 10 ml ampoules and 100 ml bottle quantities for larger applications.