دی متیل استامید GC
| 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 | ≥ | 99.5 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Water | ≤ | 0.03 | % |
| Density | 0.940 – 0.944 | ||
| Heavy metals | ≤ | 0.0002 | % |
| Color | ≥ | 10.0 | Hazen |
| Evaporation residue | ≥ | 0.3 | mg/l |
Dimethylacetamide (DMA) is a high-purity, polar aprotic solvent widely used as a sample solvent, diluent, and extraction medium in gas chromatography (GC) and analytical applications.
🏭⚗️ Production
DMA is produced through controlled chemical synthesis and purified to remove water and residual impurities. The solvent is packaged in tightly sealed, moisture-resistant containers to maintain chemical stability and ensure consistent performance in sensitive analytical procedures.
🔬 Properties
DMA is a clear, colorless liquid with a high boiling point and low volatility. It is highly polar, miscible with water and many organic solvents, and chemically stable under normal laboratory conditions. DMA dissolves a wide range of polar and non-polar compounds, making it ideal for sample preparation, standard solution preparation, and GC injection.
🧪 Applications
DMA is used to dissolve polar and thermally sensitive compounds for GC analysis. It serves as a diluent, extraction solvent, and medium for preparing analytical standards. Its polarity and solvation capacity allow accurate and reproducible chromatographic results, especially for compounds that are poorly soluble in less polar solvents.
⚠️ Safety
DMA can be harmful if inhaled, ingested, or absorbed through the skin. Handling requires gloves, protective eyewear, and lab coats, and work should be performed in a well-ventilated fume hood. Containers should be stored tightly sealed, away from heat and strong oxidizers. Waste and empty containers must be disposed of according to laboratory hazardous chemical regulations.
