English Name: n, N-dimethylformamide
Alternative name: DMF
Chemical formula: hcon (CH ₃) Ψ
CAS accession number: 68-12-2
Melting point: − 60.5 ℃
Boiling point: 152.8 ℃
[use 1] used as analytical reagent and solvent of ethylene resin and acetylene.
[application 2] it is an excellent organic solvent, which can be used as solvent for polyurethane, polyacrylonitrile and polyvinyl chloride, as well as as as an extractant, a raw material for medicine and pesticide Chlordimeform.
[application 3] dimethylformamide is not only a widely used chemical raw material, but also a good solvent. It can be used in the wet spinning of synthetic fibers such as polyacrylonitrile fiber, synthesis of polyurethane, plastic film making, paint remover for removing paint, and dissolving some low solubility pigments, so that the pigments have the characteristics of dyes. Dimethylformamide can be used in aromatics extraction, separation and recovery of butadiene from C4 fraction and isoprene from C5 fraction. DMF can also be used as an effective reagent for separating non hydrocarbon components from paraffin. The solubility of m-phthalic acid in dimethylformamide is higher than that in terephthalic acid. Solvent extraction or partial crystallization in dimethylformamide can separate the two. In petrochemical industry, dimethylformamide can be used as gas absorbent to separate and refine gas. In organic reactions, dimethylformamide is not only widely used as a solvent, but also an important intermediate in organic synthesis. In the pesticide industry, it can be used to produce chloramidine; in the pharmaceutical industry, it can be used for the synthesis of sulfadiazine, doxycycline, cortisone, vitamin B6, iodoside, qupinjing, thiadiazine, n-formylsarcolysin, antineoplastic acid, methoxyaromatic mustard, diazepam, cyclohexylnitrosourea, furfurfurfurfurfurfurfuroate, hemostatic acid, metoprolol, megestrol, Danwei, chlorpheniramine, etc. Dimethylformamide can catalyze the hydrogenation, dehydrogenation, dehydration and dehalogenation of hydrogen, which reduces the reaction temperature and improves the purity of the product.
[application 4] reagents for non-aqueous solution titration, solvent of ethylene resin and acetylene, organic synthesis, photometric determination, gas chromatography stationary liquid (the highest operating temperature is 50 ℃, the solvent is methanol), the separation and analysis of C2-C5 hydrocarbons, and the separation of N, isobutene - [1] and CIS, trans butene - [2]. Analysis of pesticide residues. Organic synthesis. Peptide synthesis. For photographic industry
