Dimethylacetamide

Dimethylacetamide, fully known as N, N-Dimethylacetamide (chemical formula: CH3C (o) n (CH3) 2), abbreviated as DMAC or DMA. A polar solvent commonly used as an aprotic solvent. Colorless transparent liquid, flammable. It can be freely mixed with organic solvents such as water, alcohol, ether, ester, benzene, chloroform and aromatic compounds. It is also used as solvent for polyacrylonitrile spinning and extraction distillation solvent for separating styrene from C 8 fraction. It is prepared by the reaction of dimethylamine and acetyl chloride.

Properties and stability
DMAC has very similar chemical properties to N, N-dimethylformamide. It is a representative amide solvent. When there is no acid or alkali, it is heated to boiling under normal pressure without decomposition, so it can be distilled under normal pressure. The hydrolysis rate is very slow. When n, N-Dimethylacetamide containing 5% water is heated at 95 ℃ for 140 hours, only 0.02% is hydrolyzed. But in the presence of acid and alkali, the hydrolysis rate increases. Saponification occurs when heating in the presence of strong alkali; When heated in the presence of H +, alcoholysis reaction occurs with alcohol.