Overview
Triethylene glycol dimethacrylate (CAS 109-16-0 ), also known as TEGDMA or Tedma, is a bifunctional methacrylate monomer used as a reactive crosslinker and diluent in UV- and peroxide-cured polymer systems.
It bridges polymer chains during cure, improving hardness, chemical resistance, and dimensional stability in the final material. In dental composites and restorative materials, TEGDMA functions as a reactive diluent.
This monomer lowers resin viscosity while contributing to the crosslinked network structure. UV-curable coatings and inks rely on it to increase crosslink density, improving scratch resistance and adhesion to substrates.
It is effective on surfaces like plastics and metals. Structural adhesives and anaerobic sealants incorporate TEGDMA to control cure speed and enhance mechanical strength in bonded assemblies.
It also serves as a comonomer in acrylic and methacrylic polymer formulations where tight control over network architecture is required. TEGDMA is supplied as a clear liquid, typically in drum and IBC quantities.
Standard technical-grade material is the most common commercial form, with inhibitor levels specified to suit storage and processing requirements. Purity grades suitable for dental and medical device applications are available.
These specialized grades may be supplied with corresponding documentation for regulatory compliance. The material is handled according to standard industrial safety protocols for methacrylate monomers.
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Physical Properties
| Melting Point | <25 °C |
| Boiling Point | 155 °C @ Press: 0.98 Torr |
| Density | 1.072 g/cm³ @ Temp: 25 °C |
| Flash Point | >230 °F |
| Color | Colourless to Pale Yellow |
| Form | Oil |
| Water Solubility | 3.6g/L at 20℃ |
| Vapor Pressure | 0.077Pa at 20℃ |
| Refractive Index | n 20/D 1.461(lit.) |
| Log P | 2.3 at 20℃ |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H335 May cause respiratory irritation H402 Harmful to aquatic life Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29161900 |
| UN Number | 3334 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 1 |
Other Names
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Chemical Properties
- CAS Number
- 109-16-0
- EC Number
- 203-652-6
- Mol. Weight
- 286.32
- HS Code
- 29161900
- Category
- Alcohols & Glycols