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Evaporation Rate Study and NDMA Formation from UDMH/NO2 Reaction ProductsLaboratory samples of uns-dimethylhydrazine (UDMH) fuel/oxidizer (nitrogen dioxide) non-combustion reaction products (UFORP) were prepared using a unique permeation tube technology. Also, a synthetic UFORP was prepared from UDMH, N-nitrosodimethylamine (NDMA), dimethylammonium nitrate, sodium nitrite and purified water. The evaporation rate of UFORP and synthetic UFORP was determined under space vacuum (approx 10(exp -3) Torr) at -40 ?C and 0 ?C. The material remaining was analyzed and showed that the UFORP weight and NDMA concentration decreased over time; however, NDMA had not completely evaporated. Over 85% of the weight was removed by subjecting the UFORP to 10(-3) Torr for 7 hours at -40 ?C and 4 hours at 0 ?C. A mixture of dimethylammonium nitrate and sodium nitrite formed NDMA at a rapid rate in a moist air environment. A sample of UFORP residue was analyzed for formation of NDMA under various conditions. It was found that NDMA was not formed unless nitrite was added.
Document ID
20120002683
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Buchanan, Vanessa D.
(Honeywell Technology Solutions, Inc. Las Cruces, NM, United States)
Dee, Louis A.
(Honeywell Technology Solutions, Inc. Las Cruces, NM, United States)
Baker, David L.
(NASA White Sands Test Facility NM, United States)
Date Acquired
August 25, 2013
Publication Date
March 24, 2003
Subject Category
Inorganic, Organic And Physical Chemistry
Report/Patent Number
JSC-CN-2366
Meeting Information
Meeting: 20th JANNAF Safety and Environmental Protections Subcommittee (S and EPS) Joint Meeting
Location: Charlottesville, VA
Country: United States
Start Date: March 24, 2003
End Date: March 27, 2003
Sponsors: Department of the Air Force, NASA Headquarters, Department of the Army, Department of the Navy
Distribution Limits
Public
Copyright
Public Use Permitted.
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