Document Type : Research Paper

Authors

1 Anbar University - College of Science

2 Anbar University - College of Education for women

10.37652/juaps.2010.15526

Abstract

This research studying the stability of unsymmetrical dimethyl hydrazine (UDMH) used
in many uses. This material unstable against different variable such as heat and oxygen gas present in the
air. Results refers that the increases of temperature and oxygen presenting affecting on the stability of this
material by exiting oxidation reactions. Oxidation of this material for six months decreases its
concentration approximately to the half. According to the conclusions obtained from the laboratory tests,
we find that the unsymmetrical Dimethylhydrazine (UDMH) is directly affected by oxygen in the
atmosphere and the increase of temperature leads to activating the oxidation reactions and this forces us
to store the fuel inert atmosphere (Nitrogen, Helium or Argon) at low temperature as possible.

Main Subjects

  1.  

    1. Gorgi M., Kazemeini M. (2006). Kinetic Investigation of NDMA to UDMH Hydrogenation on a Pd/C Catalyst. Ir. J.Sci. & Tech., 2006, 30(B5), 1-13. 

    2. U.S. Environmental Protection Agency. Health and Environmental Effects Profile for 1,1-Dimethylhydrazine.EPA/600/x-84/134. Environmental Criteria and Assessment Office, Office of Health and Environmental Assessment, Office of Research and Development, Cincinnati, OH. 1984.

    3. Schmidt E.W.(2001) Hydrazine and Its Derivatives, Preparation, Properties and Applications. John Wiley & Sons Inc, New York, N.Y.

    4. U.S. Department of Health and Human Services. Hazardous Substances Databank (HSDB, online database). National Toxicology Information Program, National Library of Medicine, Bethesda, MD. 1993.

    5. G.D. Clayton and F.E. Clayton, Eds. Patty's Industrial Hygiene and Toxicology. Volume IIA. 3rd revised ed. John Wiley & Sons, New York. 1981.

    6. D.R.Stranks,″Chemistry Structural View″, Cambridge University Press,1970.

    7. David Freifelder ″Principles of physical chemistry″, 2ndedition,Jones&Bartltt puplishers Inc.,1982.

    8. E.T.Chang and N.A.Gokeen , ″Thermodynamic properties of gases in propellants". III J. Phys. Chem., 1968, 72(7), 2556 – 62.

    9. Eckart W.Schmidts, ″Hydrazine and its derivatives ″,John Wiley &Sons,1984.

    1. 10.  The Merck Index. An Encyclopedia of Chemicals, Drugs, and Biologicals. 11th ed. Ed. S. Budavari. Merck and Co. Inc., Rahway, NJ. 1989.

    11. International Agency for Research on Cancer (IARC). IARC Monographs on the Evaluation of the Carcinogenic Risk of Chemicals to Man: Some Aromatic Amines, Hydrazine and Related Substances, N-Nitroso Compounds and Miscellaneous Alkylating Agents. Volume 4. World Health Organization, Lyon. 1974.

    12. Occupational Safety and Health Administration (OSHA).  Occupational Safety and Health Standards, Toxic and Hazardous Substances.  Code of Federal Regulations. 29 CFR 1910.1000.  1998.

    13. American Conference of Governmental Industrial Hygienists (ACGIH).  1999 TLVs and BEIs.  Threshold Limit Values for Chemical Substances and Physical Agents.  Biological Exposure Indices.  Cincinnati, OH.  1999.

    14. U.S. Environmental Protection Agency. Integrated Risk Information System (IRIS) on 1,1-Dimethylhydrazine. National Center for Environmental Assessment, Office of Research and Development, Washington, DC. 1999.