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328251

Tetramethylammonium hydroxide solution

10 wt. % in H₂O, solution

Synonym(s):

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

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About This Item

Linear Formula:
(CH3)4N(OH)
CAS Number:
75-59-2
Molecular Weight:
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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Product Name

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

Storage Class

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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Certificates of Analysis (COA)

Lot/Batch Number
BCCG6900
STBJ6189
STBJ0919
STBH2371
STBG8605

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Hui Chong et al.
Langmuir : the ACS journal of surfaces and colloids, 28(4), 2091-2098 (2011-11-08)
A new water-soluble conjugated polymer containing fluorene and boron-dipyrromethene repeat units in the backbones (PBF) that exhibits red emission was synthesized and characterized. Cationic PBF forms uniform nanoparticles with negatively charged disodium salt 3,3'-dithiodipropionic acid (SDPA) in aqueous solution through
Marta Matvienko et al.
PloS one, 8(2), e55913-e55913 (2013-02-15)
Several applications of high throughput genome and transcriptome sequencing would benefit from a reduction of the high-copy-number sequences in the libraries being sequenced and analyzed, particularly when applied to species with large genomes. We adapted and analyzed the consequences of
Konrad Rykaczewski et al.
Langmuir : the ACS journal of surfaces and colloids, 29(3), 881-891 (2012-12-25)
The prospect of enhancing the condensation rate by decreasing the maximum drop departure diameter significantly below the capillary length through spontaneous drop motion has generated significant interest in condensation on superhydrophobic surfaces (SHS). The mobile coalescence leading to spontaneous drop
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Global Trade Item Number

SKUGTIN
328251-250ML04061837369360
328251-1L04061826717370