Physical property

Dimethylformamide; Dimethylformamide; N,N-Dimethylformamide; DMF; CAS: 68-12-2

Physical and chemical properties: colorless, light amine flavor liquid. Molecular formula C3-H7-N-O. Molecular weight 73.10. The relative density is 0.9445(25℃). Melting point -61℃. Boiling point 152.8℃. Flash point 57.78 ° C. Vapor density 2.51. Vapor pressure 0.49kpa(3.7mmHg25℃). Spontaneous combustion point ° C. The explosive limit of the mixture of steam and air is 2.2 ~ 15.2%. Miscible with water and usually organic solvents. In case of open fire, high heat can cause combustion explosion. It can react violently with concentrated sulfuric acid and fuming nitric acid and even explode.

Main use

Dimethylformamide (DMF), as an important chemical raw material and solvent with excellent properties, is mainly used in polyurethane, acrylic fiber, medicine, pesticides, dyes, electronics and other industries. In the polyurethane industry as a washing curing agent, mainly used in the production of wet synthetic leather; In the pharmaceutical industry as a synthetic drug intermediates, widely used in the production of doxycycline, cortisone, sulfonamides; As a solvent in acrylic fiber industry, it is mainly used in dry spinning production of acrylic fiber. In the pesticide industry for the synthesis of high efficiency and low toxicity pesticide insecticides; In the dye industry as a dye solvent; In the electronics industry as tinned parts hardening and circuit board cleaning; Other industries include carriers of dangerous gases, solvents for pharmaceutical crystallization, adhesives, etc.

Fire protection measures

Fire extinguishing with mist water, dry powder, soluble foam, carbon dioxide, sand. Keep the container in the fire cool with water.