Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
Tris(dimethylaminomethyl)phenol (CAS: 90-72-2), also known as DMP-30, is a versatile organic compound belonging to Mannich bases. It is a viscous liquid with a characteristic amine odor, widely used as a catalyst and curing agent in the polymer industry, especially for epoxy resin curing and polyurethane formation. It also serves as a trimerization catalyst for rigid polyisocyanurate, with good catalytic activity and delayed reaction performance.
Molecular Formula & Structure
Molecular Formula: C??H??N?O
Physical Properties
- Appearance: Colorless to light yellow, clear viscous liquid; may turn reddish-brown with storage, with a characteristic amine odor.
- Melting Point: 316 °C
- Boiling Point: 130–135 °C (1 mmHg); ~320.5 °C (760 mmHg).
- Density: ~0.969–0.990 g/cm3 (25 °C).
- Solubility: Soluble in water (850 g/L at 20 °C), methanol, ethanol, benzene, acetone and most organic solvents.
- Refractive Index: n??/D 1.516–1.52 (20 °C).
- Flash Point: >124 °C (closed cup); up to 150 °C.
- Vapor Pressure: <0.01 mmHg (21 °C).
Chemical Properties
- CAS Number: 90-72-2 (confirmed); EINECS: 202-013-9.
- Chemical Type: Mannich base, organic amine compound, phenolic derivative.
- Molecular Weight: 265.40.
- pKa (Predicted): 6.27 ± 0.50.
- Chemical Characteristics: Trifunctional structure, combining a phenolic hydroxyl group with three dimethylaminomethyl substituents; stable under normal storage conditions.
- Application Type: Catalyst and curing agent, mainly used in epoxy resin curing, polyurethane synthesis and rigid polyisocyanurate trimerization.
- Toxicity: LD50 (oral, rat): 1200 mg/kg; irritant to skin and eyes.
Synthesis Method
- Raw Materials: Phenol, 40% aqueous dimethylamine solution, 37% aqueous formaldehyde solution (or paraformaldehyde).
- Synthesis Route: One-pot Mannich reaction – condensation of phenol, formaldehyde and dimethylamine, with electrophilic substitution on the phenol aromatic ring.
- Reaction Steps: Mix phenol and dimethylamine aqueous solution, cool to below 20 °C, add formaldehyde solution at below 30 °C, stir at 25–30 °C for 1 hour, then reflux at 90–95 °C for 2 hours, separate water phase with salt, and distill the oil phase under reduced pressure to obtain the product.
Storage & Safety
- Storage: Sealed, cool, dry and dark place; recommended storage temperature <15 °C (or room temperature under inert atmosphere); avoid moisture, sunlight and high temperature; keep away from drains and surface water.
- Package: Corrosion-resistant, sealed container (1 kg/bottle or 25 kg/drum); UN number: 2735, packing group III.
- Safety: Avoid skin, eye and clothing contact; do not breathe vapor; wear PPE (protective gloves, clothing, goggles, face shield) during operation; wash hands before breaks and after work; keep away from food and animal feedingstuffs.
- Hazard: Irritant, causes severe skin burns and eye damage; harmful if swallowed; thermal decomposition may release harmful gases; spill should be absorbed with liquid-binding materials and disposed properly.
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