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331635 Sigma-Aldrich

Tetramethylammonium hydroxide solution

25 wt. % in H2O

Synonym: TMAH solution

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Properties

Related Categories Acids & Bases, Ammonium Salts, Bases, Chemical Synthesis, Essential Chemicals,
vapor pressure   17.5 mmHg ( 20 °C)
InChI Key   WGTYBPLFGIVFAS-UHFFFAOYSA-M
concentration   25 wt. % in H2O
refractive index   n20/D 1.3806
density   1.016 g/mL at 25 °C

Description

Packaging

1 L in glass bottle

250 mL in glass bottle

Application

Tetramethylammonium hydroxide is a quaternary ammonium salt generally used as an anisotropic etchant for silicon due to its high silicon etching rate.

Tetramethylammonium hydroxide solution (25 wt.% solution in water) may be used as a base for pH adjustment to obtain hexagonal mesoporous aluminophosphate (TAP).

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LC-MS Grade Solvents and Reagents
Safety & Documentation

Safety Information

Signal word 
Danger
Hazard statements 
RIDADR 
UN 1835 8 / PGII
WGK Germany 
3
Flash Point(F) 
>212 °F
Flash Point(C) 
>100 °C
Protocols & Articles

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Peer-Reviewed Papers
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