Overview
N-(β-Aminoethyl)-γ-aminopropyltriethoxysilane (CAS 5089-72-5 ) is a diamine-functional silane coupling agent used to chemically bridge inorganic substrates and organic polymer matrices.
It promotes adhesion and surface compatibility at interfaces where bonding between dissimilar materials is otherwise poor. In glass fiber and mineral-filled composites, it treats filler surfaces to improve stress transfer.
This process directly impacts the mechanical performance of finished parts. Epoxy and polyurethane formulators use it as a crosslinking promoter and adhesion primer, particularly in structural adhesives.
It is also utilized in protective coatings for automotive and aerospace assemblies. Electronics manufacturers apply it as a surface primer on substrates before encapsulation or underfill processes.
This application improves moisture resistance and delamination resistance in PCB assemblies. In construction sealants and elastomeric systems, it functions as a crosslinker on glass, concrete, and metal.
The product is supplied as a liquid in standard packaging ranging from drums to IBC containers. Technical grade is the primary commercial form, with purity typically specified at 95% or higher.
Buyers should confirm silanol condensation inhibitors or stabilizer packages with suppliers. This is necessary when evaluating shelf life for storage-sensitive applications and long-term stability.
Contact us for supply of 1,2-Ethanediamine, N1-(3-(triethoxysilyl)propyl)-
Physical Properties
| Melting Point | 135°C (5 mmHg) |
| Boiling Point | 156 °C @ Press: 15 Torr |
| Density | 0.994 g/cm³ |
| Flash Point | 123°C |
| Appearance | Colorless clear liquid |
| Color | Colorless to Almost colorless |
| Form | clear liquid |
| Water Solubility | 240g/L at 20℃ |
| Vapor Pressure | 0.03Pa at 25℃ |
| Refractive Index | 1.438 |
| Log P | 1.2 at 20℃ |
Safety & Handling
Danger GHS05 GHS07 GHS09 Hazard Statements H315 Causes skin irritation H317 May cause an allergic skin reaction H318 Causes serious eye damage H411 Toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. 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. P317 Get emergency medical help. P321 Specific treatment (see … on this label). P391 Collect spillage. 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. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P305+P354+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 | 29319090 |
Other Names
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Chemical Properties
- CAS Number
- 5089-72-5
- EC Number
- 225-806-1
- Mol. Weight
- 264.44
- HS Code
- 29319090
- Category
- Silicones & Silicates