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N,N-Dihydroxyethyl-P-Toluidine
N,N-Dihydroxyethyl-p-toluidine (p-tolyldiethanolamine, TDEA, CAS 3077-12-1, EC 221-359-0) is a tertiary aromatic amine accelerator supplied by Royalchem Spain at ≥98% purity. It activates benzoyl peroxide for room-temperature free-radical curing in dental composites, acrylic structural and anaerobic adhesives, and unsaturated polyester resins, and serves as a chain extender and dye/pharmaceutical intermediate.
Product Description
N,N-Dihydroxyethyl-p-Toluidine (MDEA-pT)
Hydroxyethylated Tertiary Aromatic Amine — Polymerisation Accelerator & Curing-System Co-Agent for Adhesives, Dental Materials & Resins
CAS: 3077-12-1 EC: 221-359-0 Assay: ≥ 98.0%
N,N-Dihydroxyethyl-p-toluidine (N,N-bis(2-hydroxyethyl)-p-toluidine, MDEA-pT, CAS 3077-12-1) is a hydroxyethylated tertiary aromatic amine that pairs a p-tolyl ring with two reactive hydroxyethyl arms. It is best known as a low-odour, low-volatility accelerator for peroxide-initiated free-radical curing — in acrylic and anaerobic adhesives, dental composites, and unsaturated polyester and epoxy-acrylate systems — while its two hydroxyl groups also allow it to be built into polymer backbones as a cross-linking and stabilising co-monomer. Royalchem Spain supplies it at ≥ 98% purity as light-yellow crystals, delivered from our Valladolid distribution hub in lined drums or boxed bags.
Technical Specifications (COA Data)
| Assay | ≥ 98.0% |
| Appearance | Light-yellow crystals |
| Water Content (KF) | ≤ 0.5% |
| Molecular Weight | 195.26 g/mol |
| Density | ≈ 1.065 g/mL |
| Melting Point | ≈ 55–58 °C |
| Boiling Point | ≈ 178–180 °C (4 mmHg) |
*Regulatory: EINECS-listed (EC 221-359-0); REACH-registered; manufactured under ISO 9001. GHS — Warning: harmful if swallowed (H302); causes skin and eye irritation (H315, H319); may cause respiratory irritation (H335); as an aromatic amine derivative, prolonged exposure should be avoided. Not classified as dangerous goods for transport. Handle with gloves, eye protection, and dust control. Always refer to the current SDS.
Chemical Structure
Key Properties
• Molecular Formula: C₁₁H₁₇NO₂
• Molecular Weight: 195.26
• Form: Light-yellow crystals
• Density: ≈ 1.065 g/mL
• Molecular Weight: 195.26
• Form: Light-yellow crystals
• Density: ≈ 1.065 g/mL
Main Applications
Curing Accelerator for Adhesives & Resins
A peroxide-decomposition accelerator for room-temperature free-radical cure in acrylic structural and anaerobic adhesives, dental composites and bone cements, and unsaturated polyester and epoxy-acrylate coatings and composites — giving faster cure with lower odour and colour than classical toluidine accelerators.
Polymer Additive & Cross-Linking Co-Monomer
Its two hydroxyl groups react with isocyanates, acids, and epoxies, allowing it to serve as a chain extender, cross-linking agent, and built-in stabiliser in polyurethanes, plastics, resins, and coatings, improving durability and thermal resistance.
Surfactant, Textile & Specialty Intermediate
A hydroxyethylated amine building block with good wetting and low-foaming character for industrial cleaning and textile-processing formulations, and an intermediate for dyes and other fine chemicals.
Logistics & Packaging
Standard Packaging:
25 kg lined fibre drums or double-PE-bagged cartons — or to customer requirement. Distributed by Royalchem Spain from our Valladolid hub. Shelf life 24 months in original sealed packaging.
Storage Conditions:
Store in tightly sealed containers in a cool, dry, well-ventilated area at 5–25 °C, protected from light, moisture, oxidising agents, and peroxides (premature reaction risk); like other aromatic amines it may darken on prolonged exposure to air and light. Our technical team can advise on compatibility with specific resin systems.