Tetramethylammonium borohydride
Synonym(s):NSC 164901;TMAB
- CAS NO.:16883-45-7
- Empirical Formula: C4H16BN
- Molecular Weight: 88.99
- MDL number: MFCD00011778
- EINECS: 240-917-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-06-08 17:06:35
What is Tetramethylammonium borohydride?
The Uses of Tetramethylammonium borohydride
Reactant for:
- Preparation of iridium tetrahydride complexes bearing a tridentate pincer-type bis(phosphino)silyl ligand
- Reduction reactions (reducing agent)
Purification Methods
Recrystallisation of the borohydride from H2O three times yields ca 94% pure compound. Dry in high vacuum at 100o for 3hours. The solubility in H2O is 48% (20o), 61% (40o), and in EtOH 0.5% (25o) and MeCN 0.4% (25o). It decomposes slowly in a vacuum at 150o, but rapidly at 250o. The rate of hydrolysis of Me4N.BH4 (5.8M) in H2O at 40o is constant over a period of 100hours at 0.04% of original wt/hour. The rate decreases to 0.02%/hour in the presence of Me4NOH (5% of the wt of Me4N.BH4). [Banus et al. J Am Chem Soc 74 2346 1952, Beilstein 4 IV 148.]
Properties of Tetramethylammonium borohydride
Melting point: | 150°C (dec.) |
Density | 0,813 g/cm3 |
storage temp. | 2-8°C |
Water Solubility | almost transparency in Water |
form | crystal |
color | white |
Specific Gravity | 0.813 |
Sensitive | Moisture Sensitive |
BRN | 3684968 |
EPA Substance Registry System | Methanaminium, N,N,N-trimethyl-, tetrahydroborate(1-) (16883-45-7) |
Safety information for Tetramethylammonium borohydride
Signal word | Danger |
Pictogram(s) |
Flame Flammables GHS02 Skull and Crossbones Acute Toxicity GHS06 |
GHS Hazard Statements |
H261:Substances And Mixtures Which, In Contact With Water,Emit Flammable Gases H301:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
Precautionary Statement Codes |
P223:Keep away from any possible contact with water, because of violent reaction and possible flash fire. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P231+P232:Handle under inert gas. Protect from moisture. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Tetramethylammonium borohydride
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