UDMH Unsymmetrical dimethyl

The liquid propellant rocket combination nitrogen tetroxide (N2O4) and UDMH (unsymmetrical dimethyl hydrazine) has optimum performance at an oxidizer-to-fuel weight ratio of 2 at a chamber pressure of 67 atm. Assume that the products of combustion of this mixture are N2, CO2, H2O, CO, H2, O, H, OH, and NO. Set down the equations necessary to calculate the adiabatic combustion temperature and the actual product composition under these conditions. These equations should contain all the numerical data in the description of the problem and in the tables in the appendices. The heats of formation of the reactants are... [Pg.32]

UDMH (Unsymmetrical dimethyl hydrazine) - 219, 303, 306, 309, 312, 315, 366 Ucon products 102, 156, 283, 366, 820 Udylite 61 - 845 Ultraformer feed - 215 Ultrasonic cleaning solutions - 884 Ultraviolet light - 94 Ultrawet detergent - 185, 215 Undecyl alcohol - 93, 226 Undecylenic acid - 629 Undertaker s restorative - 845 Union oils and fluids - 283, 820 Unvis hydraulic fluid - 366 Uran 156, 215 Uranium 732 Uranium chloride - 597, 740 Uranium extraction - 215 Uranium fluoride - 215 Uranium ore - 598, 719 Uranium SX units - 215 Uranium sulfate-sulfuric acid - 384 Uranyl ammonium phosphate - 740 Uranyl nitrate - 598, 740 Uranyl sulfate - 740... [Pg.962]

Rocket fuel factory and surroundings. Fine, et al (5) reported nitrosodimethylamine (NDMA) to be present as an air pollutant in Baltimore, Maryland. The prime source was subsequently found to be a chemical plant which was manufacturing the rocket fuel, unsymmetrical dimethyl hydrazine (UDMH), for which NDMA was used as a precursor. Typical NDMA levels were between 6000 and 36,000 ng/m3 on the site of the factory, about 1000 ng/m3 in the residential neighborhood adjacent to the factory and about 100 ng/m3 two miles away in downtown Baltimore. Typical daily human exposures to NDMA were calculated to be 39 Mg at the factory site, 10 Mg in the adjacent residential neighborhood and 1.0 Mg in downtown Baltimore. It is of interest to note that a leak of just 130 g. (4.7 ounces) NDMA per hour could have explained all the airborne NDMA emissions in Baltimore. [Pg.250]

Compatibility of Materials with 50 60 Hydrazine Unsymmetrical Dimethyl Hydrazine (N2H4 UDMH)... [Pg.28]

Maleic anhydride is used in the manufacture of unsaturated polyester resins, copolymers, food additives, agricultural chemicals, and lube oil additives. Agricultural chemicals made from maleic anhydride include daminozide (Alar ), a growth regulator for apples that in 1989 was found to be carcinogenic because of a breakdown product, unsymmetrical dimethyl-hydrazine (UDMH). [Pg.314]

Thus the first storable criterion eliminates hydrazine, the second perchloryl flour-ide, and the third hydrogen peroxide so the best example as possible storable propellants are nitric acid, unsymmetrical dimethyl hydrazine (UDMH), hydrocarbon fuels, etc. [Pg.91]

Common hypergolic fuels used in spacecraft are hydrazine, monomethyl hydrazine (MMH) and unsymmetrical dimethyl hydrazine (UDMH). Hydrazine (NH -NKj), with a density close to that of water (1004 kg.m ), gives the best performance as a rocket fuel, but its high melting point (m.p. 1.4°C) combined with a poor thermal stability prevent its use as an engine coolant. Methyl hydrazine also called commercially monomethyl hydrazine (CHj-NH-NH ) referred to by the common acronym (MMH) is lighter (866 kg.m" ) and more heat-resistant than... [Pg.1012]

Metal hydrazine carboxylates Organic derivatives of hydrazine Monomethyl hydrazine (MMH) and unsymmetrical dimethyl hydrazine (UDMH)... [Pg.33]

DIMETHYLHYDRAZINE uns-DIMETHYLHYDRAZINE unsym-DIMETHYLHYDRAZINE 1,1-DIMETHYL-HYDRAZINE (GERMAN) DIMETHYLHYDRAZINE, unsymmetrical (DOT) DMH NIESYMETRYCZNA D XTJ METYLOHYDRAZYNA (POLISH) RCRA WASTE NU.MBER U098 UDMH (DOT)... [Pg.536]

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