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87741

Sigma-Aldrich

Tetramethylammonium hydroxide pentahydrate

≥95.0% (T)

Synonym(s):

TMAH Pentahydrate

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About This Item

Linear Formula:
(CH3)4N(OH) · 5H2O
CAS Number:
10424-65-4
Molecular Weight:
181.23
Beilstein/REAXYS Number:
3714235
EC Number:
200-882-9
MDL number:
MFCD00149566
UNSPSC Code:
12352100
PubChem Substance ID:
57653264
NACRES:
NA.22

vapor density

1.1 (vs air)

Quality Level

200

assay

≥95.0% (T)

form

crystals

autoignition temp.

878 °F

expl. lim.

36 %

impurities

≤0.1% halides (as chloride)

mp

67-70 °C (lit.)

anion traces

sulfate (SO42-): ≤1000 mg/kg

SMILES string

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

InChI

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

InChI key

MYXKPFMQWULLOH-UHFFFAOYSA-M

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General description

Tetramethylammonium hydroxide pentahydrate is a clathrate hydrate, which shows high proton conductivity. It can readily uptake carbon dioxide. It is a promising candidate for energy devices, gas separation, and gas storage applications.

Application

Tetramethylammonium hydroxide pentahydrate is a clathrate hydrate, which shows high proton conductivity. It can readily uptake carbon dioxide. It is a promising candidate for energy devices, gas separation, and gas storage applications.
Tetramethylammonium hydroxide pentahydrate is a clathrate hydrate, which shows high proton conductivity. It can readily uptake carbon dioxide. It is a promising candidate for energy devices, gas separation, and gas storage applications.

Tetramethylammonium hydroxide pentahydrate may be used in the preparation of a mesoporous molecular sieve belonging to the MCM-41 (mobil composition of matter No. 41) category with silica to (tetrahedral) aluminum ratio as low as 8.5:1.

Caution

material is sensitive vs air/moisture. filling, handling and storage under Argon!

signalword

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

Storage Class

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

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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NMR studies of molecular motion in tetramethylammonium hydroxide pentahydrate.
Ratcliffe CI, et al.
J. Incl. Phenom. Mol. Recog. Chem., 8(1-2), 159-175 (1990)
Proton Conduction of Tetramethylammonium Hydroxide Pentahydrate,(CH 3) 4 NOH? 5 H 2 O, and Its Application to Nickel?Metal Hydride Battery.
Kuriyama N, et al.
Journal of the Electrochemical Society, 137(1), 355-356 (1990)
High conductivity and phase transitions of tetramethylammonium hydroxide pentahydrate,(CH3) 4NOH? 5H2O.
Kuriyama N, et al.
Solid State Ionics, 40, 906-909 (1990)
Synthesis of a mesoporous MCM-41 material with high levels of tetrahedral aluminium.
Schmidt R, et al.
Journal of the Chemical Society. Chemical Communications, (12), 1493-1494 (1994)
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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