Tetramethylammonium hydroxide solution
SIAL/331635 - 25 wt. % in H2O
Synonym: TMAH solution
CAS Number: 75-59-2
Empirical Formula (Hill Notation): C4H13NO
Molecular Weight: 91.15
MDL Number: MFCD00008280
Linear Formula: (CH3)4N(OH)
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 331635-1L.
| concentration | 25 wt. % in H2O |
| density | 1.016 g/mL at 25 °C |
| form | liquid |
| InChI | 1S/C4H12N.H2O/c1-5(2,3)4; |
| InChI key | WGTYBPLFGIVFAS-UHFFFAOYSA |
| Quality Level | 200  |
| refractive index | n |
| SMILES string | [OH-].C[N+](C)(C)C |
| vapor pressure | 17.5 mmHg ( 20 °C) |
| Application: | Tetramethylammonium hydroxide is a quaternary ammonium salt generally used as an anisotropic etchant for silicon due to its high silicon etching rate. |
| Application: | Tetramethylammonium hydroxide solution (25 wt.% solution in water) may be used as a base for pH adjustment to obtain hexagonal mesoporous aluminophosphate (TAP). |
| General description: | Tetramethylammonium hydroxide solution is commonly used as a strong base and nucleophilic source in organic synthesis reactions. |
| Packaging: | 1 L in glass bottle |
| Packaging: | 250 mL in glass bottle |
| Symbol |     GHS05,GHS06,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H300 + H310 - H314 - H370 - H372 - H411 |
| Precautionary statements | P260 - P273 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 |
| Hazard Codes | T+ |
| Risk Statements | 27/28-35-48/24 |
| Safety Statements | 26-28-36/37/39-45 |
| RIDADR | UN 1835 8 / PGII |
| WGK Germany | WGK 3 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Density | 1.016 g/mL at 25 °C |
| Refractive Index | n |
| UNSPSC | 12352100 |