Tetramethylammonium hydroxide
- Product Name
- 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
- Formula Weight
- 91.15
- MOL File
- 75-59-2.mol
Tetramethylammonium hydroxide Property
- 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
- Flash point:
- 80 °F
- storage temp.
- Store below +30°C.
- solubility
- Methanol (Sparingly), Water (Slightly)
- form
- Solution
- color
- APHA: ≤10
- Odor
- strong ammonia-like odor
- PH
- >13 (H2O, 20°C)
- 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)
- EPA Substance Registry System
- Tetramethylammonium hydroxide (75-59-2)
Safety
- 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
- Hazardous Substances Data
- 75-59-2(Hazardous Substances Data)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H226Flammable liquid and vapour
H314Causes severe skin burns and eye damage
H331Toxic if inhaled
H370Causes damage to organs
H372Causes damage to organs through prolonged or repeated exposure
H412Harmful to aquatic life with long lasting effects
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P273Avoid release to the environment.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- 8.14748
- Product name
- Tetramethylammonium hydroxide
- Purity
- (25% solution in water) for synthesis
- Packaging
- 250ML
- Price
- $66.4
- Updated
- 2024/03/01
- Product number
- 8.14748
- Product name
- Tetramethylammonium hydroxide
- Purity
- (25% solution in water) for synthesis
- Packaging
- 1L
- Price
- $216
- Updated
- 2024/03/01
- Product number
- 8.14748
- Product name
- Tetramethylammonium hydroxide
- Purity
- (25% solution in water) for synthesis
- Packaging
- 25kg
- Price
- $1360
- Updated
- 2024/03/01
- Product number
- 328251
- Product name
- Tetramethylammonium hydroxide solution
- Purity
- 10 wt. % in H2O
- Packaging
- 250ml
- Price
- $71.6
- Updated
- 2024/03/01
- Product number
- 328251
- Product name
- Tetramethylammonium hydroxide solution
- Purity
- 10 wt. % in H2O
- Packaging
- 1l
- Price
- $174
- Updated
- 2024/03/01
Tetramethylammonium hydroxide Chemical Properties,Usage,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
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.
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 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.
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./ChemicalProductProperty_EN_CB2854236.htm
Tetramethylammonium hydroxide Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Tetramethylammonium hydroxide manufacturers
- Product
- Tetramethylammonium hydroxide 75-59-2
- Price
- US $5.00/KG
- Min. Order
- 1KG
- Purity
- 25%
- Supply Ability
- 1000mt/year
- Release date
- 2023-02-06
- Product
- Tetramethylammonium hydroxide 75-59-2
- Price
- US $10.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- 10 mt
- Release date
- 2024-12-09
- Product
- Tetramethylammonium hydroxide 75-59-2
- Price
- US $0.00/kg
- Min. Order
- 1kg
- Purity
- 0.99
- Supply Ability
- 20tons
- Release date
- 2023-09-13