What Is Dimethylformamide DMF?
Dimethylformamide, commonly called DMF, is a polar aprotic solvent with the CAS number 68-12-2 and the molecular formula C3H7NO. It is a colourless, water-soluble liquid with a faint amine-like odour. DMF is renowned for its high solvency and its low evaporation rate, and it forms strong hydrogen bonds with many solutes. These characteristics make it a preferred reaction medium, carrier solvent and chemical intermediate across a broad range of industrial processes.
Physical and Chemical Properties of DMF
| Property | Value |
| Boiling Point | 153 degC |
| Melting Point | -61 degC |
| Density at 20 degC | 0.944 g/cm3 |
| Solubility | Completely miscible with water, ethanol and acetone |
| Stability | Stable under normal conditions; reacts with strong oxidising agents |
DMF is stable under normal storage and handling conditions but reacts with strong oxidising agents. It is frequently used as a reagent and solvent in organic reactions, including nucleophilic substitution reactions.
Main Applications of Dimethylformamide
Polymer and Plastics Industry
DMF is used in the manufacture of polyurethane products, acrylic fibres and engineering plastics. It acts as a powerful solvent for polymerisation and fibre-spinning processes.
Pharmaceutical Industry
In pharmaceutical manufacturing, DMF is used in the synthesis of active pharmaceutical ingredients, drug purification and formulation development. As an ICH Q3C Class 2 residual solvent, its residues in medicines are strictly controlled to the established limit.
Agrochemical Industry
DMF is used in the production of pesticides, herbicides and fungicides, where it dissolves active ingredients and improves the efficiency of formulation processes.
Electronics Industry
The electronics sector uses DMF for component cleaning and in the manufacture of lithium-ion battery electrolytes, where its high purity and solvency are valued.
Organic Synthesis and Fine Chemicals
DMF is a widely used reaction solvent and reagent in the production of specialty chemicals and fine chemical intermediates.
Textile Dyeing and Finishing
In textile processing, DMF is used in dyeing and finishing baths to enhance colour fastness and improve fabric quality.
Coatings Industry
DMF acts as a high-performance coating solvent that improves film-forming properties and the durability of finished coating systems.
Safety and Handling of DMF
Despite its wide industrial use, DMF is classified as a hazardous chemical and should only be handled in controlled environments. It can pose health risks through inhalation or skin contact, and it is classified as a reproductive toxicant in several regulatory systems. Proper handling protocols, personal protective equipment and adequate ventilation are essential. Users should always consult the latest Safety Data Sheet and comply with local occupational health regulations.
Frequently Asked Questions
What is DMF solvent used for? DMF is used as a reaction medium and carrier solvent in polymer production, pharmaceutical synthesis, agrochemical formulation, electronics manufacturing, textile dyeing and coatings.
Is DMF soluble in water? Yes, DMF is completely miscible with water and with organic solvents such as ethanol and acetone.
What are the boiling and melting points of DMF? DMF boils at 153 degC and melts at -61 degC.
Why is DMF used in lithium-ion battery production? DMF is used as a high-purity solvent in the manufacture of lithium-ion battery electrolytes and in the cleaning of electronic components.
Is DMF a hazardous chemical? Yes, DMF is classified as hazardous in many jurisdictions. It can harm health through inhalation or skin contact, so ventilation, PPE and safe handling procedures are required.
Does DMF react with water? No violent reaction occurs with water. DMF is miscible with water and forms a stable solution; it is reactive with strong oxidising agents instead.