TMACL
Tetramethylammonium chloride
CAS: 75-57-0
Molecular Formula: C4H12ClN
TMACL - Names and Identifiers
TMACL - Physico-chemical Properties
| Molecular Formula | C4H12ClN |
| Molar Mass | 109.6 |
| Density | 1,17 g/cm3 |
| Melting Point | >300 °C (lit.) |
| Boling Point | 165.26°C (rough estimate) |
| Water Solubility | >60 g/100 mL (20 ºC) |
| Solubility | Soluble in methanol, soluble in water and hot ethanol, insoluble in ether and chloroform. |
| Vapor Presure | 3965.255mmHg at 25°C |
| Appearance | White Crystals |
| Specific Gravity | 1.169 |
| Color | White to ivory |
| Odor | Odorless |
| Maximum wavelength(λmax) | ['λ: 260 nm Amax: 0.02', , 'λ: 280 nm Amax: 0.02'] |
| BRN | 2496575 |
| PH | 6-8 (100g/l, H2O, 20℃) |
| Storage Condition | Store below +30°C. |
| Stability | Stable. Incompatible with strong oxidizing agents, water. Hygroscopic. |
| Sensitive | Hygroscopic |
| Refractive Index | 1.5320 (estimate) |
| MDL | MFCD00011628 |
| Physical and Chemical Properties | Melting point 420°C water-soluble> 60g/100 mL (20°C) |
| Use | Widely used in the electronics industry |
TMACL - Risk and Safety
| Risk Codes | R21 - Harmful in contact with skin R25 - Toxic if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S37/39 - Wear suitable gloves and eye/face protection S28A - S28 - After contact with skin, wash immediately with plenty of soap-suds. S36 - Wear suitable protective clothing. |
| UN IDs | UN 2811 6.1/PG 2 |
| WGK Germany | 1 |
| RTECS | BS7700000 |
| FLUKA BRAND F CODES | 3-10 |
| TSCA | Yes |
| HS Code | 29239000 |
| Hazard Class | 6.1 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: 50 mg/kg LD50 dermal Rat 537 mg/kg |
TMACL - Reference
| Reference Show more | 1. Chen Yang, Wang, Letian, Li, Wenmin et al. Preliminary study on the basic properties of porphine iron solution [J]. Journal of Nanjing Normal University (Natural Science Edition) 2020 43(01):143-148. |
TMACL - Introduction
Volatile. Easy to absorb moisture. Decomposed into trimethylamine and methyl chloride above 230 ℃. Toxic, median lethal dose (mice, abdominal cavity) 25mg/kg. It's irritating.
Last Update：2022-10-16 17:28:24
TMACL - Reference Information
| pH range | 6 - 8 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| catalyst in organic synthesis | tetramethylammonium chloride is a phase transfer catalyst in organic synthesis, and its catalytic activity is stronger than triphenylphosphorus and triethylamine, room temperature for white crystalline powder, volatile, irritant, hygroscopic, soluble in methanol, soluble in water and hot ethanol, insoluble in ether and chloroform. Heated to 230 deg C above the decomposition of trimethylamine and methyl chloride. Median lethal dose (mice, abdominal cavity) 25 mg/kg. It is also used in the synthesis of liquid crystalline epoxy compounds, polarographic and pop analysis, electronic industry, etc. |
| preparation of tetramethylammonium hydroxide by electrolysis | tetramethylammonium hydroxide is an organic base, which has a very wide range of uses in the field of industrial research. In China, it is mainly used as the main catalyst in the synthesis of silicone products, such as silicone oil, silicone rubber, silicone resin and so on. Although the dosage is small, it has a great influence on the yield and quality of the product. It is mainly used in polyester polymer, textile, plastic products, food, leather, wood processing, electroplating, microorganism and so on. now tetramethylammonium hydroxide has entered the field of cutting-edge technology, such as in the printing of circuit boards and the manufacturing of microscopes, it can be used as cleaning agent for integrated circuit board and anisotropic etchant for Si-SiO2 interface in semiconductor micromachining technology. With the development of science and technology, the requirement of this type of chemical reagent is increasing day by day, which puts forward higher requirements for the quality and quantity of tetramethylammonium hydroxide. The principle of preparing tetramethylammonium hydroxide by electrolysis is that under the action of the electric field force, the chloride ions in the aqueous solution in the anode chamber of the electrolytic cell migrate to the anode direction until the chlorine gas is discharged on the anode. At the same time, due to the selective permeability of the ion exchange membrane, chloride ions cannot diffuse through the ion exchange membrane, and only tetramethylammonium ions can selectively penetrate into the cathode chamber and are enriched therein. The water molecules in the cathode compartment of the electrolytic cell are decomposed into hydrogen and hydroxide ions at the cathode. The latter is combined with the tetramethylammonium ion which migrates from the anode compartment to form tetramethylammonium hydroxide. The concentration of tetramethylammonium hydroxide increased with the increase of the amount of electricity, and finally reached the expected crude concentration. The anodic electrochemical reaction was as follows: (CH3)4NCl →(CH3)4N Cl + 2Cl +-2e → Cl2> The cathodic electrochemical reaction was as follows: H2O → H OH ↑ (CH3)4N OH ↑ →(CH3)4NOH 2H 2e → H2 ↑ Total reaction: 2(CH3)4NCl 2H2O → 2(CH3)4NOH H2 Cl2 The hydrogen generated in the electrolysis method is vented, and the generated chlorine gas is absorbed with alkali solution to generate sodium hypochlorite, which is the main raw material of bleaching powder. Therefore, the method for preparing tetramethylammonium hydroxide has the advantages of simple method, high purity and no environmental pollution. |
| preparation of PHBHQ type thermosetting liquid crystal epoxy resin | with toluene as solvent, concentrated sulfuric acid and boric acid as catalyst, add equal amounts of p-Hydroxybenzoic acid and 1, 4-hydroquinone to a three-necked flask equipped with a water trap, react at 120-130 ℃ for 6h, cool, and wash repeatedly with distilled water, P-Hydroxybenzoic acid hydroquinone Ester was obtained after vacuum drying (white solid, yield 87.5%). the above product was dissolved in an excess of epichlorohydrin, tetramethylammonium chloride was added, and the reaction was carried out at 60-70 ° C. For 10h, and an excess of 45% NaOH aqueous solution was added dropwise (6h Dropwise). Excess epichlorohydrin was distilled off under reduced pressure, and the reactant was crystallized from an acetone-methanol mixed solution and vacuum-dried to obtain a white PHBHQ type thermosetting liquid crystal epoxy resin (yield: 37.5%). PHBHQ and curing agent according to the stoichiometric ratio of mixed heating melting, casting, curing process for 90 deg C x 1H; 120 deg C x 2H; 150 deg C x 2H; 180 deg C x 2H. |
| Usage | polarographic analysis reagent. Widely used in electronic industry tetramethylammonium chloride is a phase transfer catalyst in organic synthesis, the catalytic activity is stronger than triphenylphosphorus and triethylamine, white crystalline powder at room temperature, volatile, irritating, easy to absorb moisture, soluble in methanol, soluble in water and hot ethanol, insoluble in ether and chloroform. Heated to 230 deg C above the decomposition of trimethylamine and methyl chloride. Median lethal dose (mice, abdominal cavity) 25 mg/kg. It is also used in the synthesis of liquid crystalline epoxy compounds, polarographic and pop analysis, electronic industry, etc. |
| production method | 1.? Formic acid, formaldehyde and ammonia react to generate trimethylamine formate: trimethylamine formate reacts with sodium hydroxide to release trimethylamine and methyl chloride to generate tetramethylammonium chloride: |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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