Tetramethyl Ammonium Hydroxide
| Acronymic: TMAH |
| Synonym: N,N,N-Trimethylmethanaminium hydroxide |
| CAS No.: 75-59-2 |
| U.N.No.: 1835 |
| Hazard class: 8 |
| Packing group: II |
| Chemical formula: (CH3)4NOH·5H2O |
| Molecular weight: 181.15 |
Appearance: white crystal, contains 5 crystal waters in each molecular. Be easily solubled in alcohol and water. |
| Melting Point(°C): 63 |
Quickly absorbs carbon dioxide in air to carbonate. Strong organo-alkali, corrosive nature. Easily deliquesces, be kept in lutation. Decomposed into methanol and trimethylamine at 135°C. |
Quality Index:
Item |
Index |
| Appearance |
White crystal |
| Content (%) |
92-96 |
| Carbonate (as tetramethyl ammonium carbonate)% |
≤0.5 |
| Involatile Matters, % |
≤0.1 |
| Chloride, % |
≤0.05 |
Packing: 250g/plastic bottle, 40 bottles/piece; or on the clients' requirements.
Use: Used in no residue catalyst in organosilicon polymerization processes as Aminoalkyl Silicone Fluid, Methyl Silicone Oil, Silicone Rubber. When used solutions, can be a supporting electrolyte in polarography, a developer for photoresists, and a washing liquid for electron and electric plating.
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