Description:
N,N-Dimethylcyclohexylamine, commonly known as DMCHA (CAS 98-94-2), is a tertiary amine that typically appears as a colorless to pale yellow liquid with a distinct, strong amine odor. It is widely recognized and utilized primarily as a highly effective catalyst in the polyurethane industry. DMCHA significantly promotes the reaction between isocyanates and polyols (gelling reaction), making it indispensable for the production of various polyurethane foams. Its strong catalytic activity allows for efficient foam production cycles.
Properties:
| Property | Value |
| Chemical Formula | |
| Molecular Weight | Approximately |
| CAS Number | 98-94-2 |
| Appearance | Colorless to pale yellow liquid |
| Odor | Strong, characteristic amine odor |
| Density | Approximately at |
| Boiling Point | Approximately |
| Flash Point | Approximately (Closed Cup) |
| UN Number | Typically UN 2734 (Amines/Polyamines, liquid, corrosive, flammable, n.o.s.) |
| Primary Hazard Class | 8 (Corrosive), Sub-hazard 3 (Flammable) |
Usage:
The predominant use of N,N-Dimethylcyclohexylamine (DMCHA) is as a catalyst in polyurethane systems:
- Polyurethane Foam Production: Acts as a potent gelling catalyst in the manufacture of rigid polyurethane foams (e.g., for insulation panels, spray foam), flexible polyurethane foams (e.g., for furniture, bedding), and integral skin foams. It is often used in combination with other catalysts to balance the reaction profile (gelling vs. blowing).
- Epoxy Resin Systems: Can also be used as a curing accelerator for certain epoxy resin formulations.
Packaging and Transportation:
DMCHA is classified as a hazardous material (Corrosive and Flammable liquid). It is supplied in UN-approved packaging appropriate for such materials, typically sealed steel drums or Intermediate Bulk Containers (IBCs), ensuring safe containment. Transportation strictly follows international and national regulations for hazardous goods, requiring specific labeling (Class 8 and Class 3 placards) and documentation.
Storage:
Store N,N-Dimethylcyclohexylamine in tightly sealed containers in a cool, dry, well-ventilated area specifically designated for flammable and corrosive materials. Keep away from heat sources, sparks, open flames, direct sunlight, and incompatible substances such as strong oxidizing agents and acids. Ensure proper grounding to prevent static discharge. Adhere to all relevant safety regulations and guidelines provided in the Safety Data Sheet (SDS).