The free base is known only in solution or as a solid pentahydrate, forming colorless, deliquescent needles;Liquid;
Complexity
19.1
Corrosivity
Corrosive;
Covalently-Bonded Unit Count
2
Decomposition
When heated to decomposition it emits toxic fumes of /nitrogen oxides and ammonia/.;
EC Number
200-882-9
Exact Mass
91.1g/mol
H-Bond Acceptor
1
H-Bond Donor
1
Heavy Atom Count
6
Monoisotopic Mass
91.1g/mol
Octanol Water Partition Coefficient
log Kow = -2.47 (est);
Odor
Strong ammonia-like;
Other Experimental
Decomposes to trimethylamine and methanol upon distillation;Readily absorbs CO2 from the air;When heated to decomposition it emits toxic fumes of NOx and NH₃.;Concn: 25 wt% in water. VP: 17.5 mm Hg at 20 deg C; Index of refraction: 1/3806 at 20 deg C/D; density: 1.106 g/mL at 25 deg C /Tetramethylammonium hydroxide solution/;Henry's Law constant = 4.35X10-16 atm-cu m/mol at 25 deg C (est);Hydroxyl radical reaction rate constant = 5.06X10-12 cu cm/molec-sec at 25 deg C (est);
Physical Description
Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. It is soluble in water. It is corrosive to metals and tissue.;Liquid;
Stability
Stable under recommended storage conditions. /Tetramethylammonium hydroxide pentahydrate/;