Tetramethylammonium hydroxide
- CAS No.
- 75-59-2
- Chemical Name:
- Tetramethylammonium hydroxide
- Synonyms
- TMAH;TetramethyL;Developer;N,N,N-TRIMETHYLMETHANAMINIUM HYDROXIDE;TETRAMETHYLAMMONIUM HYDROXIDE SOL., 6% IN PROPYLENEGLYCOL;nmd3;nmw-w;TMNOH;ocg945;AZ-726
- CBNumber:
- CB2854236
- Molecular Formula:
- C4H13NO
- Molecular Weight:
- 91.15
- MDL Number:
- MFCD00008280
- MOL File:
- 75-59-2.mol
- MSDS File:
- SDS
| Melting point | °C |
|---|---|
| Boiling point | 110 °C |
| Density | 0.866 g/mL at 25 °C |
| vapor pressure | 17.5 mm Hg ( 20 °C) |
| refractive index |
n |
| Flash point | 80 °F |
| storage temp. | Store below +30°C. |
| solubility | Methanol (Sparingly), Water (Slightly) |
| form | Solution |
| color | APHA: ≤10 |
| PH | >13 (H2O, 20°C) |
| Odor | strong ammonia-like odor |
| Water Solubility | Soluble in water. |
| Sensitive | Air Sensitive |
| Merck | 14,9224 |
| BRN | 3558708 |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids. |
| InChIKey | WGTYBPLFGIVFAS-UHFFFAOYSA-M |
| CAS DataBase Reference | 75-59-2(CAS DataBase Reference) |
| FDA UNII | 5GKP7317Q2 |
| EPA Substance Registry System | Tetramethylammonium hydroxide (75-59-2) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |     GHS02,GHS05,GHS06,GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H226-H300+H310-H314-H331-H370-H372-H412 | |||||||||
| Precautionary statements | P210-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338 | |||||||||
| Hazard Codes | C,T,F,T+,Xn | |||||||||
| Risk Statements | 24/25-34-20/21/22-39/23/24/25-23/24/25-10-21/22-25-21-11-67-36-52-48/24-27/28-23-35-36/38 | |||||||||
| Safety Statements | 45-36/37/39-26-16-36/37-28 | |||||||||
| RIDADR | UN 3286 3/PG 2 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | PA0875000 | |||||||||
| F | 4.4-10-34 | |||||||||
| TSCA | Yes | |||||||||
| HazardClass | 3 | |||||||||
| PackingGroup | II | |||||||||
| HS Code | 29239000 | |||||||||
| NFPA 704 |
|
Tetramethylammonium hydroxide price More Price(60)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 8.14748 | Tetramethylammonium hydroxide (25% solution in water) for synthesis | 75-59-2 | 250ML | $66.4 | 2024-03-01 | Buy |
| Sigma-Aldrich | 8.14748 | Tetramethylammonium hydroxide (25% solution in water) for synthesis | 75-59-2 | 1L | $216 | 2024-03-01 | Buy |
| Sigma-Aldrich | 8.14748 | Tetramethylammonium hydroxide (25% solution in water) for synthesis | 75-59-2 | 25kg | $1360 | 2024-03-01 | Buy |
| Sigma-Aldrich | 328251 | Tetramethylammonium hydroxide solution 10 wt. % in H2O | 75-59-2 | 250ml | $71.6 | 2024-03-01 | Buy |
| Sigma-Aldrich | 328251 | Tetramethylammonium hydroxide solution 10 wt. % in H2O | 75-59-2 | 1l | $174 | 2024-03-01 | Buy |
Tetramethylammonium hydroxide Chemical Properties,Uses,Production
Description
Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. It is soluble in water, and corrosive to metals and tissue.
Chemical Properties
colourless to yellow liquid
Uses
Tetramethylammonium hydroxide solution (25 wt.% solution in water) may be used as a base for pH adjustment to obtain hexagonal mesoporous aluminophosphate (TAP).
Uses
Tetramethylammonium hydroxide is used to produce tetramethyl-ammonium azide. It is used as an anisotropic etchant of silicon, basic solvent in the development of acidic photoresist in photolithography process, as surfactant in the synthesis of ferrofluid and as a polarographic reagent. It finds application in the production of organic silicon, where it is used for computer silicon wafer surface brightener and cleaning agent. It is also involved in the purification of some metallic elements.
Uses
General Description
Tetramethylammonium hydroxide is a quaternary ammonium salt generally used as an anisotropic etchant for silicon due to its high silicon etching rate.
Reactivity Profile
Tetramethylammonium hydroxide acts like a base. Bases are chemically similar to sodium hydroxide (NaOH) or sodium oxide (Na2O). They neutralize acids exothermically to form salts plus water. When soluble in water they give solutions having a pH greater than 7.0. Mixing these materials with water can generate troublesome amounts of heat as the base is dissolved or diluted. Bases react with certain metals (such as aluminum and zinc) to form oxides or hydroxides of the metal and generate gaseous hydrogen. Bases may initiate polymerization reactions in polymerizable organic compounds, especially epoxides). They may generate flammable and/or toxic gases with ammonium salts, nitrides, halogenated organics, various metals, peroxides, and hydroperoxides. Materials of this group often serve as catalysts.
Hazard
Strong irritant to skin and tissue.
Health Hazard
TOXIC; inhalation, ingestion or skin contact with material may cause severe injury or death. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Fire Hazard
Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated. Runoff may pollute waterways. Substance may be transported in a molten form.
Safety Profile
Poison by subcutaneous route. A powerful caustic. A corrosive irritant to skin, eyes, and mucous membranes. When heated to decomposition it emits toxic fumes of NOx and NH3.
Purification Methods
It is freed from chloride ions by passage through an ion-exchange column (e.g. Amberlite IRA-400, prepared in its OH-form by passing 2M NaOH until the effluent is free from chloride ions, then washed with distilled H2O until neutral). A modification, to obtain carbonate-free hydroxide, uses the method of Davies and Nancollas [Nature 165 237 1950]. [Beilstein 4 IV 145.]
References
1.https://en.wikipedia.org/wiki/Tetramethylammonium_hydroxide#Uses
2.http://sacheminc.com/other-chemicals/tetramethylammonium-hydroxide-tmah/
3.https://www.fs.usda.gov/treesearch/pubs/15506
4.https://www.concordia.ca/content/dam/concordia/services/safety/docs/EHS-DOC-020_TMAHGuidelines.pdf
5.https://www.chemicalbook.com/ChemicalProductProperty_EN_CB2854236.htm
Tetramethylammonium hydroxide Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| BLiT (Hefei)Chemical Co.,Ltd | +86-551-62622640 | sales@blitchem.com | China | 291 | 58 |
| Hebei Mojin Biotechnology Co., Ltd | +8613288715578 | sales@hbmojin.com | China | 12471 | 58 |
| Henan Bao Enluo International TradeCo.，LTD | +86-17331933971 +86-17331933971 | deasea125996@gmail.com | China | 2503 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-371-66670886 | info@dakenam.com | China | 15957 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21689 | 55 |
| ATK CHEMICAL COMPANY LIMITED | +undefined-21-51877795 | ivan@atkchemical.com | China | 32686 | 60 |
| Hefei TNJ Chemical Industry Co.,Ltd. | +86-0551-65418679 +86-18949832763 | info@tnjchem.com | China | 2989 | 55 |
| career henan chemical co | +86-0371-86658258 | sales@coreychem.com | China | 29914 | 58 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 | linda@hubeijusheng.com | CHINA | 28180 | 58 |
| Jinan Finer Chemical Co., Ltd | +86-531-88989536 +86-15508631887 | sales@finerchem.com | China | 2966 | 58 |
View Lastest Price from Tetramethylammonium hydroxide manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2024-05-17 | Tetramethylammonium hydroxide
75-59-2
|
US $5.00 / KG | 1KG | 25% | 1000mt/year | Jinan Finer Chemical Co., Ltd | |
 |
2023-09-13 | Tetramethylammonium hydroxide
75-59-2
|
US $0.00 / kg | 1kg | 0.99 | 20tons | Hebei Yanxi Chemical Co., Ltd. | |
 |
2023-09-06 | Tetramethylammonium hydroxide
75-59-2
|
US $0.00 / KG | 1KG | 99% | 50000KG/month | Hebei Mojin Biotechnology Co., Ltd |
-
- Tetramethylammonium hydroxide
75-59-2
- US $5.00 / KG
- 25%
- Jinan Finer Chemical Co., Ltd
-
- Tetramethylammonium hydroxide
75-59-2
- US $0.00 / kg
- 0.99
- Hebei Yanxi Chemical Co., Ltd.
-
- Tetramethylammonium hydroxide
75-59-2
- US $0.00 / KG
- 99%
- Hebei Mojin Biotechnology Co., Ltd
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