2035-89-4

Usage

Uses

Used in Aerospace Industry:
1,1-Dimethyl-2-methylenehydrazine is used as a rocket propellant for its high energy density and performance capabilities, contributing to the propulsion of various space vehicles and rockets.
Used in Pharmaceutical Research:
1,1-Dimethyl-2-methylenehydrazine is studied as a potential chemotherapy drug, leveraging its inherent toxic properties to target and eliminate cancer cells. However, its application in this field is under rigorous investigation due to its associated health risks.

InChI:InChI=1/C3H8N2/c1-4-5(2)3/h1H2,2-3H3

Upstream product

• 124-40-3 dimethyl amine 
• 57-14-7 N,N-Dimethylhydrazine 

Downstream Products

• 67398-36-1 N,N-dimethyl-N'-pentyl-hydrazine 
• 29559-82-8 N'-ethyl-N,N-dimethyl-hydrazine 
• 54007-23-7 1,1-dimethyl-2-n-butylhydrazine 
• 1741-01-1 Trimethylhydrazin 
• 111999-43-0 3-(Dimethyl-hydrazono)-1-phenyl-propane-1,2-dione 
• 111999-51-0 Oxo-phenyl-acetic acid N-chloromethyl-N',N'-dimethyl-hydrazide 
• 143357-64-6 N,N-Dimethyl-N'-[3-nitro-2-p-tolyl-prop-(E)-ylidene]-hydrazine 
• 50679-18-0 (trimethylhydrazino)dihydroborane 
• 121-44-8 triethylamine 

Relevant academic research and scientific papers

Liquid missile propellants in the former Soviet Union

The liquid missile propellant unsymmetrical dimethylhydrazine (UDMH) is a very toxic and persistent organic chemical that was widely used in the missile industry of the former Soviet Union. Only in the last few years have Russian authorities acknowledged the dangers of this fuel to people and nature. To date, little has been done for the transition towards fuels with a lower toxicity. This paper describes the chemical nature of UDMH, and considers its potential impacts on nature and human health. Copyright (C) 1999 ElsevierScience Ltd. All rights reserved.

Degradation of gaseous unsymmetrical dimethylhydrazine by vacuum ultraviolet coupled with MnO2

In this study, α-, β-, and δ-MnO2 were prepared by a uniform hydrothermal method and then coupled with vacuum ultraviolet (VUV) for the degradation of gaseous unsymmetrical dimethylhydrazine (UDMH). The performance in the removal of UDMH, by-product distribution and mechanism were systematically investigated. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption/desorption, Field Emission Scanning Electron Microscopy (FE-SEM), Raman, thermogravimetry (TG), Fourier-transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) to investigate the factors affecting the catalytic activity. The results showed that O2 and H2O were essential for the removal of UDMH. Photooxidation and ozone catalytic oxidation contribute to the removal and mineralization of UDMH. The integrated process considerably improved the removal and mineralization of UDMH by ozone catalytic oxidation. More reactive oxygen species were generated in the integrated process. The catalytic activity of the prepared catalysts follows the order: δ-MnO2 > α-MnO2 > β-MnO2. δ-MnO2 displayed the highest removal rate of 100% and a CO2 concentration of 42 ppmv. The good performance of δ-MnO2 was mainly attributed to the large number of surface oxygen vacancies.

Adsorption and photocatalytic degradation of gas-phase UDMH under simulated sunlight by AgBr/TiO2/rGA

The degradation of UDMH has long been a concern for its harmful effects on humans and the environment. The current research on gas-phase UDMH treatment is limited and mainly focuses on ultraviolet light and high temperature environments, however the highly toxic substance NDMA is easily produced. In order to investigate the possibility of UDMH degradation in sunlight, AgBr/TiO2/rGA composites were prepared with the addition of different amounts of silver bromide. The highest UDMH conversion of AgBr/TiO2/rGA in humid air is 51%, much higher than the control group value of 24%, which can be ascribed to the synergy of adsorption and photocatalysis. The graphene and silver in AgBr/TiO2/rGA not only enhance the adsorption of light and UDMH, but also inhibit charge recombination and enhance electron-hole separation. More importantly, the temperature of the AgBr/TiO2/rGA composite was raised by the photothermal effect of graphene with promoted UDMH degradation efficiency. Furthermore, it is noted that NDMA was not detected in the optimal conditions.

TiO2-reduced graphene oxide for the removal of gas-phase unsymmetrical dimethylhydrazine

Unsymmetrical dimethylhydrazine (UDMH) contaminated waste gas and related intermediates pose a great threat to human health. TiO2-reduced graphene oxide aerogel (rGA) samples with different graphene content levels were synthetized and characterized for the degradation of UDMH. The effects of GO content, humidity, and temperature were investigated under UV and VUV light, with highest UDMH conversion values of 68% and 95%, respectively. Compared with pure TiO2, the enhanced degradation activity of TiO2-rGA under UV light can be attributed to a synergetic effect between absorption and photocatalysis, while the high UDMH conversion under VUV light relies on photolysis and ozonation. The high oxygen-containing group content, rather than a high SSA, and electron trapping by graphene are key factors determining the outstanding performance of TiO2-rGA with 80 mg of GO. The prepared TiO2-graphene aerogels are promising for the degradation of gas-phase UDMH. This journal is

MODELISATION GENERALE DES PROCESSUS REACTIONNELS INTERVENANT AU COURS DE LA SYNTHESE DE LA DIMETHYLHYDRAZINE ASYMETRIQUE PAR LE PROCEDE RASCHIG. QUANTIFICATION DES PRODUITS DE DEGRADATION (HYDRAZONE). I. FORMULATION DU MODELE. VALIDITE EN MILIEU DILUE. INTERPRETATION

A kinetic model of Unsymetrical dimethylhydrazine (UDMH) formation by Raschig process has been established.Its application range runs from pH = 8 to 14.64 (4 mol.l-1 NaOH).The synthesis is controlled by the acid-base dissociation equilibria : (NH2Cl NHCl- + H+; (CH3)2NH2(+) (CH3)2NH + H+; (CH3)2NHNH2+ (CH3)2NNH2 + H+) and by the following elementary reactions : -Dimethylhydrazine elaboration molecular (NH2Cl / (CH3)2NH) and ionic (NHCl- / (CH3)2NH) processes -Dimethylchloramine formation from NH2Cl and (CH3)2NH2+ -UDMH catalytic oxidation by NH2Cl and dimethyldiazene (CH3)2N+=N- intermediate formation -Diazene decomposition to yield formaldehyde dimethylhydrazone (FDMH) -Degradation of (CH3)2N+=N- by NH2Cl -Alkaline hydrolysis of chloramine.The synthesis can be expressed by a differential system of which the integration allows to foresee the evolution of mixtures in terms of concentration, pH and temperature.In particular, it allows a numeric evaluation of FDMH, troublesome by-product of the UDMH manufacture.Significant examples selected in different pH ranges and concentration have permitted to test the coherence between experimental and calculated curves.