| Identification | More | [Name]
Tetramethylammonium hydroxide | [CAS]
75-59-2 | [Synonyms]
N,N,N-TRIMETHYLMETHANAMINIUM HYDROXIDE
TETRAMETHYLAMMONIUM HYDROXIDE
TMAH
hydroxydedetetramethylammonium
megapositcd14
Methanaminium,N,N,N-trimethyl-,hydroxide
n,n,n-trimethyl-methanaminiuhydroxide
nmd3
nmw-w
ocg945
tetramethyl-ammoniuhydroxide
tetramethylammoniumhydroxide,10%solutioninwater
tetramethylammoniumhydroxide,solution
TETRAME-AMMONIUMHYDROXIDE/H20
Tetramethyl ammonium
Tetramethylaminonium hydroxide
TETRAMETHYLAMMONIUM HYDROXIDE, 10 WT. % SOLUTION IN WATER
TETRAMETHYLAMMONIUM HYDROXIDE SOL., 6% IN PROPYLENEGLYCOL
TETRAMETHYLAMMONIUM HYDROXIDE, 1.0M SOLN . IN H2O, A.C.S. REAGENT
TETRAMETHYLAMMONIUM HYDROXIDE SOLUTION, ~10% IN WATER | [EINECS(EC#)]
200-882-9 | [Molecular Formula]
C4H13NO | [MDL Number]
MFCD00008280 | [Molecular Weight]
91.15 | [MOL File]
75-59-2.mol |
| Chemical Properties | Back Directory | [Appearance]
colourless to yellow liquid | [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 ]
n20/D 1.384
| [Fp ]
80 °F
| [storage temp. ]
2-8°C
| [solubility ]
Methanol (Sparingly), Water (Slightly) | [form ]
Solution | [color ]
APHA: ≤10 | [Odor]
strong ammonia-like odor | [PH]
>13 (H2O, 20°C) | [Stability:]
Stable. Flammable. Incompatible with strong oxidizing agents, strong acids. | [Water Solubility ]
Soluble in water. | [Sensitive ]
Air Sensitive | [Merck ]
14,9224 | [BRN ]
3558708 | [Henry's Law Constant]
2.3×1010 mol/(m3Pa) at 25℃, HSDB (2015) | [InChI]
1S/C4H12N.H2O/c1-5(2,3)4;/h1-4H3;1H2/q+1;/p-1 | [InChIKey]
WGTYBPLFGIVFAS-UHFFFAOYSA-M | [SMILES]
[OH-].C[N+](C)(C)C | [CAS DataBase Reference]
75-59-2(CAS DataBase Reference) | [EPA Substance Registry System]
75-59-2(EPA Substance) |
| Questions And Answer | Back Directory | [Preparation]
There are many methods for preparing tetramethylammonium hydroxide, the most common being the silver oxide method, which involves the reaction of tetramethylammonium chloride with silver oxide. However, this method is complex, uses expensive silver oxide as a raw material, and produces a product with high levels of impurity ions, such as halide ions and alkali metal ions. When used in the catalytic polymerization of organosilicon monomers, this severely affects the properties of the organosilicon products and fails to meet the cleaning and corrosion requirements of the electronics industry.
Since the 1970s, foreign countries have adopted a new electrolytic process for preparing tetramethylammonium hydroxide, gradually replacing the silver oxide method. The electrolytic method produces a product of better quality and lower cost, meeting the needs of organosilicon production and entering the electronics industry. |
| Safety Data | Back Directory | [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 | [Risk Statements ]
R24/25:Toxic in contact with skin and if swallowed .
R34:Causes burns.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
R39/23/24/25:Toxic: danger of very serious irreversible effects through inhalation, in contact with skin and if swallowed .
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed .
R10:Flammable.
R21/22:Harmful in contact with skin and if swallowed .
R25:Toxic if swallowed.
R21:Harmful in contact with skin.
R11:Highly Flammable.
R67:Vapors may cause drowsiness and dizziness.
R36:Irritating to the eyes. | [Safety Statements ]
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S16:Keep away from sources of ignition-No smoking .
S36/37:Wear suitable protective clothing and gloves . | [RIDADR ]
UN 3286 3/PG 2
| [WGK Germany ]
1
| [RTECS ]
PA0875000
| [F ]
4.4-10-34 | [TSCA ]
Yes | [REACH Registrations]
Active | [HazardClass ]
3 | [PackingGroup ]
II | [HS Code ]
29239000 | [Storage Class]
3 - Flammable liquids | [Hazard Classifications]
Acute Tox. 2 Dermal
Acute Tox. 2 Oral
Acute Tox. 3 Inhalation
Aquatic Chronic 3
Eye Dam. 1
Flam. Liq. 3
Skin Corr. 1B
STOT RE 1 Dermal
STOT SE 1 | [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. | [Hazardous Substances Data]
75-59-2(Hazardous Substances Data) |
| Hazard Information | Back Directory | [General Description]
TETRAMETHYLAMMONIUM HYDROXIDE(75-59-2) is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. TETRAMETHYLAMMONIUM HYDROXIDE(75-59-2) is soluble in water. TETRAMETHYLAMMONIUM HYDROXIDE(75-59-2) is corrosive to metals and tissue. | [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. | [Air & Water Reactions]
TETRAMETHYLAMMONIUM HYDROXIDE is soluble in water. | [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. | [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]
Industry
Application
Role/benefit
Organic silicon
Production of dimethyl silicone oil, organic silicon resin, silicon rubber, etc.
Catalyst/removed easily; no pollution to the products
Chemical analysis
Polarography experiment
Polarographic reagent
Thermochemolysis to study fungal degradation of wood
Analytical reagent
Chemical purification
Removal of metal elements
Ash free alkali/source of base; make the metal elements precipitated
Electron
Production of computer silicon chip
Brightening agent; anisotropic etching agent; cleaning agent; photoresist developer
Printing of circuit board
Cleaning agent
Semiconductor manufacturing
Chemical stripper
Others
Synthesis of ferrofluid
Surfactant/ inhibit nanoparticle aggregation
Synthesis of zeolite
Structure directing agent
| [Hazard]
Strong irritant to skin and tissue. | [reaction suitability]
reaction type: Acid-base reactions
reaction type: Redox Reactions | [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.] |
| Questions and Answers (Q&A) | Back Directory | [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
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| Company Name: |
Alfa Aesar
|
| Telephone: |
400-6106006 |
| Website: |
http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
|
| Telephone: |
400-0056266 |
| Website: |
www.energy-chemical.com |
| Company Name: |
Jia Xing Isenchem Co.,Ltd
|
| Telephone: |
0573-85285100 18627885956 |
| Website: |
https://www.chemicalbook.com/ShowSupplierProductsList14265/0_EN.htm |
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