3-Aminopropyltrimethoxysilane
CAS 13822-56-5
EC 237-511-5
Formula C6H17NO3Si
MW 179.29 g/mol
Silicones & Silicates Coatings, Adhesives, Sealants & ElastomersPlastics & PolymersElectronicsAutomotivePersonal Care & Cosmetics Surface Modification & WettingCross-linking & CuringRheology Modification
Description
3-Aminopropyltrimethoxysilane (CAS 13822-56-5) is an aminosilane coupling agent sold under trade names including KBE 903, SC 3900, CA0880, and A 0800. It carries no assigned E-code. The molecule combines a reactive alkoxysilane group with a primary amine, enabling covalent bonding between inorganic substrates and organic polymer matrices.
In epoxy and polyurethane coatings, it bonds the resin network directly to glass or metal surfaces by hydrolyzing to form silanol groups that condense with surface hydroxyl sites, while the amine reacts into the polymer chain. In electronics encapsulants and fiber-reinforced composites, this dual reactivity reduces delamination under thermal cycling and moisture exposure.
This material is supplied as a neat liquid and is registered under REACH (EC 237-511-5), with an HS code of 29310095. It carries no E-code designation and is not compendial under Ph.Eur. or FCC. Procurement quantities typically range from drum to IBC formats depending on supplier.
In epoxy and polyurethane coatings, it bonds the resin network directly to glass or metal surfaces by hydrolyzing to form silanol groups that condense with surface hydroxyl sites, while the amine reacts into the polymer chain. In electronics encapsulants and fiber-reinforced composites, this dual reactivity reduces delamination under thermal cycling and moisture exposure.
This material is supplied as a neat liquid and is registered under REACH (EC 237-511-5), with an HS code of 29310095. It carries no E-code designation and is not compendial under Ph.Eur. or FCC. Procurement quantities typically range from drum to IBC formats depending on supplier.
Physical Properties
| Melting Point | <-60°C |
| Boiling Point | 80 °C @ Press: 8 Torr |
| Density | 1.027 g/cm³ |
| Flash Point | 182 °F |
| Appearance | Colorless transparent liquid |
| Color | Clear colorless |
| Odor | Ammoniacal odor |
| Form | Liquid |
| Water Solubility | reacts |
| Vapor Pressure | 0-12790Pa at 20-25℃ |
| Refractive Index | n 20/D 1.424(lit.) |
| pH | >9 (20g/l, H2O, 20℃) |
| Log P | -4--0.82 at 20℃ |
Safety & Handling (Learn More)
Danger GHS05 GHS07
H
H314H315H318H319
P
P260P264P280P316P317P321P363P405P501P264+P265P302+P352P304+P340P332+P317P337+P317P362+P364P301+P330+P331P302+P361+P354P305+P351+P338P305+P354+P338
Trade & Regulatory
| HS Code | 29310095 |
| UN Number | 2735 |
| Storage Class | 10 - Combustible liquids |
| WGK (Germany) | 3 |
Other Names
3-trimethoxysilylpropan-1-amine3-(trimethoxysilyl)propylamineAPTMSA 1110A 0800SC 3900KBE 903Dynasylan AMMO
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