Dimethylacetamide DMAC (CAS No 127-19-5) is extensively employed for dissolving polymers (such as acrylic esters and polyurethanes) and in pharmaceutical synthesis. Its miscibility with most organic solvents and water makes it an ideal choice for fiber spinning and as a reaction medium.
Dimethylacetamide (DMAc) Solvent Specifications
| Product Name | N,N-Dimethylacetamide |
| Synonyms | DMAc, DMA, dimethyl acetamide |
| CAS Number | 127-19-5 |
| Molecular Formula | C₄H₉NO |
| Molecular Weight | 87.12 g/mol |
| Appearance | Colorless transparent liquid |
| Purity (GC) | ≥ 99.5% |
| Density (20°C) | 0.936 g/cm³ |
| Boiling Point | 164–166 °C |
| Melting Point | −20 °C |
| Flash Point | 66–70 °C (Closed Cup) |
| Refractive Index (20°C) | 1.437–1.439 |
| Water Content | ≤ 0.05% |
| Acidity (as Acetic Acid) | ≤ 0.005% |
| Residue on Evaporation | ≤ 0.005% |
| Color (APHA) | ≤ 10 |
| Solubility | Miscible with water and most organic solvents |
| Vapor Pressure | 1.3 mmHg (20 °C) |
Why is dimethylacetamide used as a solvent?
High Solubility
DMAc dissolves polymers (such as polyurethane, polyimide, polyacrylonitrile) that conventional solvents cannot process, thereby enhancing reaction efficiency and formulation stability.
High Boiling Point and Stability
With a boiling point of approximately 165°C, DMAc remains stable at elevated temperatures.
Highly Efficient Polar Non-Protonic Solvent
As a polar non-protonic solvent, it stabilizes reaction intermediates, accelerates pharmaceutical and polymerization processes, and improves yields.
Excellent Polymer Compatibility
It exhibits good miscibility with various industrial polymers, facilitating the preparation of uniform solutions and high-quality fibers, coatings, and films.
Recyclable and Cost-Effective
DMAc can be recycled and reused, reducing solvent consumption and lowering costs.
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| Packaging Type | Net Weight |
|---|---|
| Steel Drum | 160 kg |
| ISO Tank | 20–22 MT |
| IBC Tank | 800–1000 kg |
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