Tetramethylammonium hydroxide liquid state: Commonly, it is a colorless and transparent aqueous solution (concentration 25% - 50%). High-purity products have no impurity color, while industrial grades may be slightly light yellow. It has strong alkalinity (pH≈14) and an ammonia smell, and its viscosity increases with the increase of concentration. Solid state: White crystalline powder, with extremely strong hygroscopicity. At room temperature, it rapidly deliquesces into a viscous liquid. Therefore, it rarely exists in pure solid form and mostly in the form of hydrates (such as pentahydrate).

CHEMICAL PROPERTIES

SAFETY INFORMATION

PRODUCT USAGE

Tetramethylammonium Hydroxide (TMAH) is a strongly alkaline compound that appears as a colorless, transparent liquid. It is readily soluble in water and ethanol, possesses strong corrosive properties, and exhibits excellent catalytic activity. Its primary application lies in organic synthesis, where it serves as a strong base catalyst to accelerate reactions such as transesterification and hydrolysis. In the electronics sector, it is utilized for semiconductor wafer cleaning and photoresist stripping, thereby ensuring precision in chip manufacturing. In the chemical industry, it functions as an acid scavenger and neutralizing agent in organic synthesis, and is also employed in the preparation of quaternary ammonium salts; consequently, it stands as an indispensable key raw material across fields such as fine chemicals, electronics manufacturing, and pharmaceuticals.