Dimethyl acetamide cas no 127-19-5 (DMAc) is a combustible liquid, it is classified as a combustible liquid ratherthan highly flammable.
However, DMAc is not highly flammable compared with many common organic solvents because it has a relatively high flash point of about 70 °C (158 °F). Under normal room temperature conditions, it presents lower fire risk than solvents such as acetone or toluene.
When Dimethyl Acetamide DMAc is heated above its flash point, it produces flammable vapors. If these vapors mix with air and encounter an ignition source, combustion may occur.
However, due to its relatively high flash point:
- It is difficult to ignite at room temperature
- Its vapor pressure is lower than that of many volatile solvents
- The fire risk is moderate rather than high
Therefore, DMAc is widely used in industrial chemical processes.
Technical Data Sheet
| Product Name | Dimethyl Acetamide |
| Other Names | DMAc/DMA, N,N-Dimethylacetamide |
| CAS Number | 127-19-5 |
| Molecular Formula | C₄H₉NO |
| Molecular Weight | 87.12 g/mol |
| Appearance | Colorless transparent liquid |
| Purity | ≥99.5% |
| Density | 0.936 g/cm³ (20°C) |
| Boiling Point | 164–166°C |
| Melting Point | −20°C |
| Flash Point | 66–70°C (Closed cup) |
| Refractive Index | 1.437–1.439 (20°C) |
| Solubility | Miscible with water and most organic solvents |
| Vapor Pressure | 1.3 mmHg (20°C) |
| Water Content | ≤0.05% |
| Acidity (as Acetic Acid) | ≤0.005% |
| Residue on Evaporation | ≤0.005% |
Safety Tips When Handling dimethylacetamide solvent
1. Personal Protective Equipment (PPE)
- Skin Protection: Wear chemical-resistant gloves (butyl rubber recommended) and a lab coat or apron.
- Eye Protection: Wear tightly fitting safety goggles + face shield; contact lenses prohibited.
- Respiratory Protection: Use NIOSH/MSHA-certified organic vapor respirator when ventilation is inadequate or exposure exceeds 10 ppm.
2. Engineering Controls and Operational Practices
- Operate in well-ventilated areas or chemical fume hoods.
- Wash hands thoroughly after handling.
3. Storage and Fire Safety
- Store in a cool, dry, well-ventilated area with tightly sealed containers.
- Keep away from strong oxidizers, acids, halogenated compounds, and ferrous materials.
- Avoid heat, sparks, and open flames; extinguish fires with water spray, alcohol-resistant foam, dry powder, or carbon dioxide.
4. Emergency Response Procedures
- Skin/Eye Contact: Rinse with copious amounts of water for ≥15 minutes; remove contaminated clothing.
- Inhalation: Move to fresh air; administer artificial respiration if necessary.
- Ingestion: Do not induce vomiting; seek immediate medical attention.
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FAQ
What is the flash point of dimethyl acetamide cas no 127-19-5?
Dimethylacetamide (DMAc or DMAC) has a flash point typically reported between 58"Cand 70°C (136° F-158° F).
What is the Boiling Point of dimethyl acetamide cas no 127-19-5?
DMAc has a boiling point of approximately 165°C to 166°C (329°F to 331'F) at standard atmospheric pressure (760 mmHg).
Is DMAc dangerous to handle?
N,N-Dimethylacetamide is a hazardous flammable liquid that may cause serious health hazards through skin absorption, inhalation, or ingestion. Standard industrial safety procedures must be followed when handling DMAc.
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