Hi. I have catalogued fish in both ethanol and isopropanol. How can I determine which is which? Thanks. NMcC Nancy Glover McCartney, PhD Curator of Zoology UA Collections Facility 2435 Hatch Fayetteville, AR 72701 http://www.uark.edu/~arsc/collections/index.html Phone: 479-575-4370 FAX: 479-575-7464