METHYLHYDRAZINE

60-34-4

Hydrazine, methyl-

Methyl Hydrazine

Monomethylhydrazine

Methyl-hydrazine

1-Methylhydrazine

Metylohydrazyna

RCRA waste number P068

N-methylhydrazine

2-methylhydrazine

CH3NHNH2

MMH

UWA30B5Z1J

CHEMBL160520

DTXSID4020874

Monomethyl Hydrazine

Methylhydrazine (mono)

Metylohydrazyna [Polish]

20244-39-7

CCRIS 394

HSDB 1172

EINECS 200-471-4

UN1244

RCRA waste no. P068

UNII-UWA30B5Z1J

BRN 0635645

methyldiazane

methl hydrazine

AI3-52240

N-methyhydrazine

N-methyl hydrazine

N-methyl-hydrazine

2-methyl hydrazine

MeNHNH2

Methylhydrazine, 98%

H2NNHCH3

EC 200-471-4

METHYLHYDRAZINE [MI]

METHYLHYDRAZINE [HSDB]

BCP07836

BBL011339

BDBM50049259

STL146429

AKOS005720746

Methylhydrazine [UN1244] [Poison]

UN 1244

BP-11387

BP-30186

Methylhydrazine, purum, >=98.0% (GC)

M0558

NS00002460

InChI=1/CH6N2/c1-3-2/h3H,2H2,1H

A832701

Q417347

HDN

1,2-Dimethylhydrazine is a weak base with a pKa of 7.87(1). This value indicates that methylhydrazine will partially exist as a cation in water and moist soil surfaces and cations do not volatilize. The Henry's Law constant for the free base of methylhydrazine is estimated as 3X10-6 atm-cu m/mole(SRC) from its vapor pressure, 50 mm Hg(2), and water solubility, 1X10+6 mg/L(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(4) is estimated as 5 days (SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(4) is estimated as 62 days(SRC). Methylhydrazine's Henry's Law constant indicates that the free base may volatilize from moist soil surfaces(SRC). The potential for volatilization of methylhydrazine from dry soil surfaces may exist(SRC) based on its vapor pressure(2).

Using a structure estimation method based on molecular connectivity indices(1), the Koc for methylhydrazine can be estimated to be 18(SRC). According to a classification scheme(2), this estimated Koc value suggests that methylhydrazine is expected to have very high mobility in soil. The pKa of methylhydrazine is 7.87(3). This pKa value indicates that this compound will partially exist as a cation in moist soils and cations generally adsorb more strongly to organic carbon and clay than the corresponding free base(4).