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Merck

T7505

Tetramethylammonium hydroxide pentahydrate

≥97%

Synonym(s):

TMAH

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About This Item

Linear Formula:
(CH3)4N(OH) · 5H2O
CAS Number:
10424-65-4
Molecular Weight:
181.23
UNSPSC Code:
12161900
NACRES:
NA.25
PubChem Substance ID:
24900455
EC Number:
200-882-9
Beilstein/REAXYS Number:
3714235
MDL number:
MFCD00149566

Key Documents

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InChI

1S/C4H12N.6H2O/c1-5(2,3)4;;;;;;/h1-4H3;6*1H2/q+1;;;;;;/p-1

InChI key

MYXKPFMQWULLOH-UHFFFAOYSA-M

SMILES string

O.O.O.O.O.[OH-].C[N+](C)(C)C

vapor density

1.1 (vs air)

description

non-ionic

assay

≥97%

autoignition temp.

878 °F

mol wt

181.23 g/mol

expl. lim.

36 %

mp

67-70 °C (lit.)

Quality Level

200

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General description

Tetramethylammonium hydroxide (TMAOH) is an ion-pairing agent that is usually used in analytical chemistry. It is used in the analysis of marine compounds by thin-layer chromatography-pyrolysis-gas chromatography-mass spectrometry (TLC-pyrolysis-GC/MS) and thermal desorption/capillary GC/inductively coupled plasma mass spectrometry. TMAOH is used in the capillary zone electrophoresis technique for the separation of inorganic anions. Some studies report the oligonucleotide reassociation in the presence of TMAOH. TMAOH aids in the synthesis of organic and inorganic compounds, such as vinyl halides and tetramethylammonium dithiocarboxylates. It is useful in the preparation of iron oxide nanoparticles for use as magnetic resonance imaging contrast agents.

Application

Tetramethylammonium hydroxide pentahydrate has been used in a study to assess strains of Pseudomnas species by a single-step gas chromatographic characterization procedure. It has also been used in a study to investigate solid-state metal hydride batteries nickel oxyhydroxide-metal hydride and manganese dioxide-metal hydride.
Tetramethylammonium hydroxide pentahydrate has been used in the synthesis of silicalite-1 seed crystals.

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Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - STOT RE 1 Dermal - STOT SE 1

target_organs

Central nervous system, Liver,thymus

Storage Class

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Poisonous substance

pdsc

Class I Designated Chemical Substances

prtr

T7505-VAR: + T7505-25G:4548173321295 + T7505-100G:4548173321271 + T7505-5G:4548173321301 + T7505-1KG:4548173321288 + T7505-BULK:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCQ0769
MKCQ6548
MKCM2287
MKCM1510
MKCL0002

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T J Wade et al.
Applied microbiology, 27(2), 303-311 (1974-02-01)
Strains of saccharolytic and nonsaccharolytic Pseudomonas species were examined by a new single-step gas chromatographic characterization procedure. Cells were digested in a methanolic solution of tetramethylammonium hydroxide pentahydrate, and the digestates were subjected to gas-liquid chromatographic analysis. The chromatograms were
Solid-state metal hydride batteries using tetramethylammoniumhydroxidepentahydrate
Kuriyama, N., et al.
Solid State Ionics, 53-56, 688-688 (1992)
High conductivity and phase transitions of tetramethylammoniumhydroxidepentahydrate, (CH3)4NOH?5H2O
Kuriyama, N., et al.
Solid State Ionics, 40-41, 906-906 (1990)
ZuLiang Chen et al.
Analytical and bioanalytical chemistry, 375(1), 182-187 (2003-01-10)
In this paper, the use of an ion-pairing reagent to improve the separation selectivity of inorganic anions in CZE was demonstrated by the addition of tetramethylammonium hydroxide (TMAOH) to the electrolyte. The separation of inorganic anions (Cl(-), I(-), Br(-), NO(2)(-)
Markus Welcker et al.
Genes & development, 27(23), 2531-2536 (2013-12-04)
The Fbw7 tumor suppressor targets a broad network of proteins for ubiquitylation. Here we show critical functions for Fbw7 dimerization in regulating the specificity and robustness of degradation. Dimerization enables Fbw7 to target substrates through concerted binding to two suboptimal
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