MONOMETHYLHYDRAZINE MMH

PRODUCT IDENTIFICATION 

Product Name

Monomethylhydrazine

CAS Number	60-34-4
HS	2928000020
EINECS	200-471-4
RTECS Class	Mutagen; Reproductive Effector

 PHYSICAL AND CHEMICAL PROPERTIES

Product Name	Monomethylhydrazine
Alternatives Names	Methylhydrazine, N-Methyl Hydrazine
Appearance	It is a clear, colorless liquid with Ammonia-like odor. It is a volatile chemical substance and a hydrazine derivative
Formula	CH6N2
Molecular Weight	46.07.00
Relative Density	0.87 (99%) 0.993 (40%)
Melting Point	-52.4°C
Boiling Point	87.8°C (99%) 106°C (40%)
Flash Point	-8°C (99%) 93°C (40%)
Autoignition Temperature	196°C
Density	0.8632 g/cm3 (30 C)
Vapor Pressure	64 (25 C)
Vapor Density	1.6
Odor Threshold	1,75mg / m3
Refractive Index	1.433 (20 C)
Heat Of Vaporization	36,1 kJ / mol
Heat Of Combustion	-1170 kJ / mol

MAIN USES

  Monomethylhydrazine is a volatile chemical substance used in different fields such as AEROSPACE, PHARMACEUTICAL and AGROCHEMICAL one:

FIELD		PRODUCT	FUNCTION
PHARMACEUTICAL	INTERMEDIATE	Sintesi thiotrzinone	One of the pro-drug
AGRICULTURAL- CHEMICAL	INTERMEDIATE	1，3-Dimethyl-5-pyrazolone (DMPO)	Agro-chemical Intermediate
	HERBICIDE	Pyrazosulfuron-ethyl Halosulfuron metile	Sulfuryl used as Paddyfield Herbicide
		Pyrazolate Benzofenap Pyrazoxyfen	5-hydroxide-radical-Pyrazole Herbicide
	ACARICIDE	Fenpyroximate Tebufenpyrad Tolfenpyrad	New Acaricide

HYDRAZINE HYDRATE METHOD

One of the main manufacturing techniques of MMH is the Hydrazine Hydrate  method:

MMH is prepared from reation of Methanol  and Hydrazine Hydrate at elevated pressure: 0.7——1.3Mpa(million Pascal) through catalytic treatment with Dichloromethane and hydrochloric acid. 

MMH is removed by distillation from the reaction mixture in a low boiler fraction and this low boiler fraction is optionally subjected to a rectification.  

Methanol andhydrazine hydrate were recycled through technological operation  and system control.