Tetraethylammonium hydroxide, 25% w/w in methanol

It is used as a phase transfer catalyst, the template agent synthesized by molecular sieve and cleaning agents, as a surfactant, used to anisotropically etch silicon, in thermochemolysis, as a basic solvent in the development of acidic photo resist in the photolithography process.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.