Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
Basic Information
Product Name: 1,3-Dimethyl-2-imidazolidinone
CAS Number: 80-73-9
Alias: DMI, N,N'-Dimethylethyleneurea
Molecular Formula: C5H10N2O
Molecular Weight: 114.15
IUPAC Name: 1,3-dimethylimidazolidin-2-one
Structural Information
- Structure Type: Polar aprotic cyclic amide solvent
- Structural Features: Five-membered imidazolidinone ring with two N-methyl substituents; strong dipole, high solvency power for polymers, inorganic salts, organic drugs; high boiling point, low volatility, excellent thermal stability
Physical & Chemical Properties
- Appearance: Colorless transparent liquid
- Odor: Faint weak amine odor
- Melting Point: 8.2 °C
- Boiling Point: 226 °C
- Flash Point: 120 °C (closed cup)
- Density (20℃): 1.044 g/cm3
- Solubility: Miscible with water, alcohols, ketones, esters, ethers, aromatic solvents; dissolves polar polymers, metal halides, pharmaceutical intermediates
- Stability: Thermally stable at high temperature; resistant to hydrolysis under neutral/weak acid/weak alkali; reacts with strong acid at high temperature; compatible with most raw materials except strong oxidants
Synthesis & Applications
Production Method
Ethylenediamine reacts with methylating agent to get N,N'-dimethylethylenediamine, then cyclization with carbonylation reagent to obtain DMI by rectification purification.
Main Applications
- Pharmaceutical synthesis solvent: High-boiling polar solvent for API cyclization, coupling, halogenation reactions
- Polymer processing solvent: Dissolving agent for polyimide, polyamide, aramid fiber
- Electronic chemical auxiliary: Lithium battery additive, circuit board cleaning solvent
- Cosmetic penetration enhancer: Promote transdermal absorption of active ingredients
- Pesticide & fine chemical reaction medium
Safety & Storage Instructions
GHS Hazard Classification
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Personal Protection
Organic vapor mask, chemical splash goggles, nitrile gloves; operate in ventilated fume hood
Storage Condition
Sealed steel drum, cool dry ventilated warehouse; separate from strong oxidants, strong mineral acids
Transportation
General organic solvent, non-flammable high-boiling liquid; avoid high temperature and direct sunlight
Quality Specifications
- Purity: ≥99.0% (GC)
- Water content: ≤0.05%
- Chroma (Pt-Co): ≤10
- Free amine: ≤0.1%
Information Summary Table
| Item | Specification |
| CAS Number | 80-73-9 |
| Product Name | 1,3-Dimethyl-2-imidazolidinone |
| Synonym | DMI, N,N'-Dimethylethyleneurea |
| Molecular Formula | C5H10N2O |
| Molecular Weight | 114.15 |
| Appearance | Colorless transparent liquid |
| Boiling Point | 226°C |
| Flash Point | 120°C |
| Solubility | Miscible with water and all common organic solvents |
| Purity Standard | ≥99.0% |
| Storage Condition | Sealed cool storage, isolate oxidants and strong acid |
| Hazard Property | Mild irritant to skin, eyes and respiratory tract |
| Main Usage | Pharmaceutical high-boiling reaction solvent, polymer dissolving agent, electronic chemical auxiliary, transdermal penetration booster |
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