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Tetramethylammonium hydroxide solution

10 wt. % in H₂O, solution

Sinónimos:

N,N,N-trimethyl-methanaminium hydroxide, TMAH, TMAOH

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Fórmula lineal:
(CH3)4N(OH)
Número CAS:
75-59-2
Peso molecular:
91.15
NACRES:
NA.21
PubChem Substance ID:
24859725
UNSPSC Code:
12352100
MDL number:
MFCD00008280
Beilstein/REAXYS Number:
3558708
Concentration:
10 wt. % in H2O
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Nombre del producto

Tetramethylammonium hydroxide solution, 10 wt. % in H2O

vapor pressure

17.5 mmHg ( 20 °C)

Quality Level

100

reaction suitability

core: ammonium

concentration

10 wt. % in H2O

refractive index

n20/D 1.3521

pH

(ca.13 at 20 °C (68 °F))

solubility

water: soluble

density

1.006 g/mL at 25 °C

functional group

amine

SMILES string

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

InChI

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

InChI key

WGTYBPLFGIVFAS-UHFFFAOYSA-M

General description

Tetramethylammonium hydroxide (TMAH), is a commercially available quaternary ammonium base with significantly higher basicity than ammonium hydroxide.

Application

Tetramethylammonium hydroxide solution (10 wt. % in H2O) can be used as:      
  • A reactant to synthesize epoxy-polyhedral oligomeric silsesquioxanes (EPOSS) via sol-gel method using 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS) in IPA.     
  • An ionic liquid to modify SnO2 nanocrystals, which are applicable as an efficient electron transport layer in perovskite solar cells.

TMAH can also be used as an anisotropic etchant for silicon due to its high silicon etching rate. The main advantage of using TMAH is that it causes no danger to electrical circuits due to the absence of alkali ions.

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Danger

Hazard Classifications

Acute Tox. 1 Dermal - Acute Tox. 3 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Skin Corr. 1B - STOT RE 1 Dermal - STOT SE 1

target_organs

Central nervous system, Liver,thymus

Clase de almacenamiento

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter

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Certificados de análisis (COA)

Lot/Batch Number
BCCN9956
BCCM6483
BCCL4821
BCCJ5659
BCCG6900

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Vladislav V Lobodin et al.
Analytical chemistry, 85(16), 7803-7808 (2013-08-08)
Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) enables the direct characterization of complex mixtures without prior fractionation. High mass resolution can distinguish peaks separated by as little as 1.1 mDa), and high mass accuracy enables assignment of
Jong Tae Leem et al.
Polymers, 13(10) (2021-06-03)
EPOSS of polyhedral oligomeric silsesquioxanes (POSS) mixture structure and LPSQ of ladder-like polysilsesquioxane (LPSQ) structure were synthesized via sol-gel reaction. EPSQ had a high molecular weight due to polycondensation by potassium carbonate. The EPSQ film showed uniform surface morphology due
Lina Barreto et al.
Eukaryotic cell, 10(9), 1241-1250 (2011-07-05)
Potassium homeostasis is crucial for living cells. In the yeast Saccharomyces cerevisiae, the uptake of potassium is driven by the electrochemical gradient generated by the Pma1 H(+)-ATPase, and this process represents a major consumer of the gradient. We considered that
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