DMF (dimethylformamide) is a transparent liquid that is miscible with water and most organic solvents, making it an excellent non proton polar solvent. Can be used for wet spinning of synthetic fibers such as polyacrylonitrile fibers and synthesis of polyurethane; Used for plastic film production; It can also be used as a paint remover to remove paint; It can also dissolve certain low solubility pigments, giving them the characteristics of dyes.

　　Dimethylformamide (DMF) is an excellent organic solvent with high boiling point, low freezing point, and good chemical and thermal stability. For example, the acrylic fiber produced by the dry spinning process using DMF as a solvent has the characteristics of good hydrophobicity, strong coverage, soft texture, and strong hand feel. In the production of wet polyester synthetic leather, DMF solution can be used to coat various stretchable or silk matrix materials. Used as a solvent in dyes for synthetic fiber dyeing, it can improve uniformity and other properties.

　　Due to its strong solubility, DMF is particularly useful in film and fiber production. In addition, it can also be used as a co solvent in coatings, printing inks, and adhesive formulations. For example, the acrylic fiber produced by the dry spinning process using DMF as a solvent has the characteristics of good hydrophobicity, strong coverage, soft texture, and strong hand feel. DMF can be used as a washing and curing agent for polyurethane resin in the production of wet polyester synthetic leather. When used for leather dyeing, it can make the leather color uniform and not fade. For example, adding certain polyamides to DMF solution for synthetic fiber dyeing can improve uniformity.

　　In addition, DMF can also be used as a solvent for carriers, such as forming a polymer crystal by combining DMF with BF3 (boron trifluoride), which transforms BF3 from a gas to a solid and facilitates transportation.

　　As a selective solvent used in separation processes, DMF can be used for selective absorption of various hydrocarbons and inorganic gases. If DMF is used to wash ethylene to remove acetylene, then ethylene can be purified. When DMF is used for the extraction distillation of C4 and C5 fractions, the temperature of both the extraction distillation tower and the washing tower reboiler can be reduced when using a hydrocarbon diluent with a boiling point between DMF and the hydrocarbon to be separated. DMF can also be used for the separation of esters and ethers, by combining DMF with objectively existing high boiling point solvents to separate ethyl acetate from binary or ternary azeotropes of ethanol/water.

　　DMF, as a selective solvent, can be used in extraction processes in many fields such as petroleum processing. For example, in the refining process of lubricating oil raw materials, DMF can effectively extract and separate non chain alkanes from chain alkanes; In polycarboxylic acid systems with similar properties and difficult separation, such as isophthalic acid and terephthalic acid, they can be easily separated by DMF solvent extraction or stepwise recrystallization; DMF can also extract cyanuric acid from crude amides containing urea, biuret, and cyanuric acid. In addition, DMF can also be used to extract and separate acids from petroleum fractions, and to separate fatty acids from aluminum soap.

　　In addition, DMF is also used as a reaction medium for chemical synthesis, a crystallization solvent for refining drugs, and quenching tin plated components.