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Isothermal Decomposition of Hydrogen Peroxide DihydrateWe present a new method of growing pure solid hydrogen peroxide in an ultra high vacuum environment and apply it to determine thermal stability of the dihydrate compound that forms when water and hydrogen peroxide are mixed at low temperatures. Using infrared spectroscopy and thermogravimetric analysis, we quantified the isothermal decomposition of the metastable dihydrate at 151.6 K. This decomposition occurs by fractional distillation through the preferential sublimation of water, which leads to the formation of pure hydrogen peroxide. The results imply that in an astronomical environment where condensed mixtures of H2O2 and H2O are shielded from radiolytic decomposition and warmed to temperatures where sublimation is significant, highly concentrated or even pure hydrogen peroxide may form.
Document ID
20120010284
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Loeffler, M. J.
(Virginia Univ. Charlottesville, VA, United States)
Baragiola, R. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 26, 2013
Publication Date
May 5, 2011
Publication Information
Publication: The Journal of Physical Chemistry
Publisher: American Chemical Society
Volume: 115
Subject Category
Inorganic, Organic And Physical Chemistry
Report/Patent Number
GSFC.JA.00144.2012
Distribution Limits
Public
Copyright
Other

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