Dimethyl acetamide
| Formula | C4H9NO |
| Chemical formula | CH3CON(CH3)2 |
| Density | ~ 0.94 g/cm3 (20°c) |
| Molar mass | 87.12 g/mol |
| CAS number | 127-19-5 |
| HS Code | 29241900 |
| EC number | 204-826-4 |
| Storage | store at +15 to +25 °c |
| SDS | available |
| RTECS | LQ2100000 |
| R phrase | R 61-E20/21 |
| S phrase | S 53-45 |
| Odour | amine-like |
| Form | liquid |
| Color | colourless to yellow |
| Explosion limit | 1.7 – 11.5 vol % |
| Ignition temprature | 400 °C |
| Solubility in water | freely soluble |
| Flash point | 70 °C |
| Melting point | ~-20°C |
| Boiling point | 165 – 166 °C |
| Vapur pressure | 1.76 hPa (20°c) |
| Viscosity dynamical | 1.02 mPa*s (20°c) |
| Purity | ≥ | 99.0 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Water | ≤ | 0.03 | % |
| Density | 0.940 – 0.944 | ||
| Heavy metals | ≤ | 0.0002 | % |
Dimethylacetamide is a polar, aprotic organic solvent widely used in chemical synthesis, polymer processing, and pharmaceutical manufacturing.
🏭⚗️ Production
DMAc is produced industrially by reacting acetic acid with dimethylamine under controlled conditions. It can also be synthesized via acylation of dimethylamine with acetyl chloride or acetic anhydride in laboratories.
🔬 Properties
DMAc appears as a clear, colorless to pale yellow liquid with a mild amine-like odor. Its chemical formula is C₄H₉NO, with a molar mass of approximately 87.12 g/mol. It is miscible with water and many organic solvents, has a boiling point of about 165°C, and is stable under normal conditions.
🧪 Applications
DMAc is widely used as a solvent for polymers like polyacrylonitrile and polyvinyl chloride, in pharmaceutical synthesis, and in the production of synthetic fibers and films. It is also employed in paint stripping and as a reaction medium.
⚠️ Safety
DMAc is harmful if inhaled or absorbed through the skin and can cause irritation to eyes and respiratory tract. Prolonged exposure may affect the liver and kidneys. Use of gloves, goggles, and proper ventilation is recommended. It should be stored in tightly closed containers away from heat and oxidizing agents.
