N, N- dimethylformamide, abbreviated as DMF, is a colorless, transparent liquid. It is a polar inert solvent. Except for halogenated hydrocarbons, N, N-dimethylformamide can be mixed with water and most organic solvents.
Categories：Aliphatic Nitrogen Compounds
|Color (Pt-Co)||≤5 Hazen|
|Iron (Fe)||≤0.050 mg/kg|
|Conductivity (25°C, 20% Aqueous),||≤2.00μѕ/cm|
|pH (25°C,20% Aqueous)||6.5-8.0|
N, N-dimethylformamide is an excellent organic solvent and important chemical raw materials. It can be widely used as a solvent for polyurethane, polyacrylonitrile, and polyvinyl chloride.
N, N-dimethylformamide is used in medicine to synthesize sulfadiazine, cortisone and vitamin B6 etc. Pesticides are used to synthesize insecticide squinting. A component used in petroleum chemistry for the extraction of diene.
1.Formic Acid Method
Generated by formic acid and methanol esterification methyl formate. And then with dimethylamine gas instead should be generated dimethylformamide. Then get N, N-dimethylformamide through pressurizing and rectification methanol and methyl formate recovered by distillation.
2. One Step Method
The direct reaction of dimethylamine and carbon monoxide in the action of sodium methanol. Reaction conditions is 1.5 ~ 2.5 MPa and 110 ~ 150 ° C. N, N-dimethylformamide can be gotten by rectification the crude products.
3. High-Pressure Method
By carbon dioxide and methanol under high pressure and 80 ~ 100 ° C temperature by carbonyl synthesis of methyl formate. Then generated by reaction with dimethylamine dimethyl formamide, get N, N-dimethylformamide after distillation.
4. Trichloroacetaldehyde Method
By the reaction of Trichloroacetaldehyde and Dimethylamine, get N, N-dimethylformamide.
Low toxicity, slight irritation to the skin and mucous membranes. But dimethylamine is highly toxic. It can damage the liver seriously. So the production equipment to be sealed, the operator to bring a good protective equipment.