A brief report summarizes an investigation of less-toxic alternatives to toxic monopropellant fluids used in launch vehicles, upper stages, and spacecraft propulsion. The toxic fluids in question are (1) hydrazine and its derivatives, used, variously, as fuels or by themselves as catalytically decomposable monopropellants; and (2) nitrogen dioxide, used as an oxidizer for such fuels.

This work was done by Paul E. Penwell, Jeff C. Bottaro, and Mark A. Petrie of SRI International for Glenn Research Center. To obtain a copy of the report, "Development of new High-Performance Ammonium Dinitramide based and Hydrazinium Salt based Monopropellants," access the Technical Support Package (TSP) free on-line at www.nasatech.com/tsp  under the Materials category.

Inquiries concerning rights for the commercial use of this invention should be addressed to

NASA Glenn Research Center,
Commercial Technology Office,
Attn: Steve Fedor,
Mail Stop 4–8,
21000 Brookpark Road,
Cleveland, Ohio 44135.

Refer to LEW-17143.