| Color | Yellow |
| Formula Weight | 91.15 |
| Physical Form | Clear Liquid at 20°C |
| Chemical Name or Material | Tetramethylammonium Hydroxide (10% in Water) |
| UN Number | 1835 |
| 60966 |
Synonym: tetramethylammonium hydroxide, tmah, hydroxyde de tetramethylammonium, nmw-w, nmd 3, tetramethyl ammonium hydroxide, unii-5gkp7317q2, ammonium, tetramethyl-, hydroxide, methanaminium, n,n,n-trimethyl-, hydroxide, tetramethylammoniumhydroxide
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Tetramethylammonium hydroxide is a quaternary ammonium compound used as a strong organic base. It appears as a colorless to pale yellow liquid, typically in aqueous or methanolic solution.
Tetramethylammonium hydroxide uses include photoresist developer in semiconductor fabrication, etching agent, organic synthesis catalyst, and as a phase transfer catalyst in chemical processes.
The tetramethylammonium hydroxide structure features a central nitrogen atom bonded to four methyl groups forming a positively charged cation, paired with a hydroxide anion.
Yes, tetramethylammonium hydroxide is corrosive and toxic, requiring proper protective equipment when handling due to risks of skin, eye, and respiratory irritation.
Store tetramethylammonium hydroxide in a cool, dry, and well-ventilated area, tightly sealed, and away from acids and oxidizing agents to maintain stability and safety.
