Evaporation Rate 10 : The rate at which a material vaporizes from a liquid or solid state compared to the vaporization rate of a known standard (normal butyl acetate=1)
W. A. N Dorland and E. J. Taylor (editors), Glossary of MSDS Terms, Texas A&M University, USA 2001. http://www.bio.tamu.edu/USERS/TONNA/GLOSSARY.HTM, (MSDS - Amer) {631}