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1,3-dimethyl-2-imidazolidinone(dmi) cas 80-73-9

Chemical Name: 1,3-Dimethyl-2-Imidazolidinone(DMI)

CAS No.: 80-73-9

Molecular Fomula:C5H10N2O

Molecular weight:114.15

Appearance:Colorless and transparent liquid

Assay: 99.5%


1,3-Dimethyl-2-Imidazolidinone(DMI) Quick Details

Chemical Name: 1,3-Dimethyl-2-Imidazolidinone(DMI)

CAS No.: 80-73-9

Molecular Fomula:C5H10N2O

Chemical Structure:1,3-Dimethyl-2-Imidazolidinone Structure

Molecular weight:114.15

Appearance:Colorless and transparent liquid

Assay: 99.5%

1,3-Dimethyl-2-Imidazolidinone(DMI) Typical Properties

Item Specifications
Appearance Colorless and transparent liquid
Color ≤25
Content by GC (%) ≥99.5
Water (%) ≤0.1
Refractive index(25℃) 1.468 -1.473
PH (10% in water) 7.0-8.0

1,3-Dimethyl-2-Imidazolidinone(DMI) Usage

As an aprotic strong polar solvent, 1,3-dimethyl-2-imidazolidinone has special physical and chemical properties and is widely used in medicine, refining, dyes/pigments, microelectronics, engineering plastics, cleaning. With fields such as surface treatment.

In the field of medicine, it has a remarkable effect as a transdermal absorption agent for drugs. In the field of polymers, it can promote the mixing of raw materials and catalysts, improve the chemical, thermal and mechanical properties of polymers; in the field of liquid crystal materials, high-quality porous ultrafiltration membranes can be obtained. It is a liquid crystal locating agent with stable storage performance; it is used as an organic reaction solvent to promote intermolecular and intramolecular condensation reactions to prepare macromolecular heterocyclic compounds, and nucleophilic substitution, reduction, oxidation, elimination, halogen under alkaline conditions. The applications in the field of exchange reaction, Kolbe-Schmitt reaction and Ullmann reaction have good effects.

1.Used to study the functionalized hydridosilane double-base transition metal complexes stabilized by photochemical formation of aryl silanes.

2.An aprotic dipolar solvent, often used as a carcinogen HMPA substitution.

3.reaction solvent

Due to its excellent thermal and chemical stability, DMI has solubility in inorganic, organic compounds and various resins, and its catalytic action as an aprotic polar solvent makes it a particularly effective reaction solvent. . With DMI, it is possible to increase the yield and effectively control side reactions while shortening the reaction time.

DMI can effectively promote various nucleophilic substitution reactions, such as the synthesis of phenyl ether derivatives, amino compounds, and fluorobenzene derivatives. Its high dielectric constant and solvation of cations can catalyze anion nucleophilic reactions. These synthetic products are used as intermediates in the synthesis of agrochemicals, pharmaceuticals, dyes, and monomers of high performance resins.

4.Petroleum products

DMI has high boiling point and high thermal stability and is not easy to form an azeotrope with other substances. Therefore, it can be used in many industrial processes such as liquid-liquid extraction, countercurrent distribution, extractive distillation and countercurrent washing. DMI is a good BTX (benzene, toluene and xylene) extractant because it dissolves aromatic compounds and unsaturated hydrocarbons but does not dissolve paraffins.

5.polymer reaction solvent

DMI is the only solvent used in the production of heat-resistant thermoplastics. It is also effective as a solvent for various polymer synthesis processes and as a cleaning agent for polymerization and plastic molding. In the production of polyamide and polyimide resins, DMI accelerates the formation of amide and imine groups to give high molecular weight polymers, and the resulting solution is suitable for solution spinning to obtain high temperature resistant polyimide fibers.

In the production of polyphenylene sulfide resin (PPS), electronic materials having a very small amount of organic impurities can be obtained by DMI. In the production of polyphenylene ether sulfone resin, DMI can effectively control the occurrence of side reactions and obtain high quality polymer products. When the polyimide resin and the polysulfone resin are formed into a film and the polyetherketone resin film is stretched, treatment with DMI can make the film more uniform.

6.lithography process stripper

Due to its low viscosity and high dielectric constant, DMI can be used as an electrolyte solvent for high performance lithium batteries. In addition, it has strong penetrability, high boiling point and high temperature resistance, and it can also be used as a stripper for silicon chip photoresist. Its rapid peeling and non-corrosive properties can greatly simplify the stripping process and accelerate the chip production rate.


Adding DMI to a mixture of surfactants, bases, alcohols and polyoxyethylene alkyl ethers gives a strong detergent. Because DMI is very easy to dissolve dirt, it can also be used to formulate a highly effective cleaning solution for cleaning glass and metals.

8.Dyes and pigments

The ink made by mixing DMI with solvent components and dyes and pigments can be printed with contrast and the image is clear.

9.surface treatment agent

DMI can be used as a surface treatment agent to improve the bonding strength of ABS, polyimide, PPS, Teflon and other materials to epoxy resin adhesives.

1,3-Dimethyl-2-Imidazolidinone(DMI)Recommended usage method

It is worth mentioning that DMI can be used repeatedly as a solvent. Increased DMI utilization and cost savings.

1,3-Dimethyl-2-Imidazolidinone(DMI) Packaging and Shipping

Packing: 200kg/ Drum

Delivery: Sea or air


Cool and seated, protect from light.

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