2023-10-08 22:40:34
Introduction
Hydrazine hydrate General CAS No. 7803-57-8 PubChem 24654 SMILES InChI Chemical properties Molecular formula H6N2OH2N-NH2•H2O Mass (The term mass is used to designate two quantities attached to a…) molar 50.0604 ± 0. 0011 g·mol-1 Physical properties Melting temperature (In physics and metallurgy, fusion is the passage of a body from the solid state to the state…) -51.7 °CT° boiling (L boiling is the formation of bubbles during a violent change of a body…) 119 °C Miscible solubility Density (Density is a physical quantity which characterizes the mass of a material by…) 1 032 kg·m-3 Flash point (Graph) 75 °C Optical properties Refractive index (The refractive index of a medium at a given wavelength measures the factor of…) 1.4285-1.4315 Precautions Directive 67/548/EEC
T
N R-phrases: 23/24/25, 34, 43, 45, 50/53, S-phrases: 45, 53, 60, 61, Transport (Transportation is the act of carrying something, or someone, one place to another, most…)
SI & CNTP units, unless otherwise indicated.
Hydrazine hydrate is the chemical compound with the formula N2H4•H2O. It contains 61% hydrazine by mass and 39% water (Water is a ubiquitous chemical compound on Earth, essential for all…).
Used by the Germans since the 1940s in the B-Stoff and C-Stoff for the propulsion of certain aircraft (Messerschmitt 163B) , hydrazine hydrate is used until today as a propellant (A propellant, in the field of astronautics, is a homogeneous substance used alone or in…) reducing agent in the liquid propellants of certain space launchers. It was notably referenced by Arianespace (The private company Arianespace SA founded in 1980 is, in its own words,…) for its Ariane 2 launchers (Ariane 2 is the second generation of the Ariane rocket.) to Ariane 4 (Ariane 4 was a rocket which made it possible to place satellites in orbit around the…) in a mixture of 75% UDMH – 25% hydrate of hydrazine, called UH 25. Its melting point is in fact significantly lower than that of pure hydrazine: -51 .7 °C, compared to 1 °C for hydrazine, and its density slightly higher: 1,032 kg·m- 3 against 1,004.5 kg·m-3, without degradation of the energy performance of this fuel, which makes it an efficient propellant for launchers.
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