3-Aminopropyltrimethoxysilane (CAS 13822-56-5) is an amino-functional silane coupling agent and the trimethoxy analogue of KH-550, offering faster hydrolysis and higher reactivity to improve adhesion between inorganic surfaces and organic polymer systems.
| Chemical Name | 3-Aminopropyltrimethoxysilane |
| CAS No. | 13822-56-5 |
| EINECS No. | 237-511-5 |
| Empirical Formula | C₆H₁₇NO₃Si |
| Molecular Weight | 221.145 g/mol |
3-Aminopropyltrimethoxysilane is a widely used amino-functional silane coupling agent that acts as an effective molecular bridge between inorganic substrates and organic polymer systems. Its molecular structure contains a reactive amino group and three hydrolyzable methoxy groups, enabling strong chemical bonding with mineral surfaces while participating in organic resin reactions.
In aqueous or alcohol-based systems, the methoxy groups hydrolyze to form silanol groups, which readily condense with hydroxyl-containing inorganic surfaces such as glass, silica, metal oxides, and minerals. Meanwhile, the amino functionality interacts with polymer matrices—particularly epoxy, polyurethane, phenolic, and certain rubber systems—resulting in enhanced interfacial adhesion.
| Item | Specification |
|---|---|
| Chemical Name | 3-Aminopropyltrimethoxysilane |
| CAS No. | 13822-56-5 |
| EINECS No. | 237-511-5 |
| Molecular Formula | C₆H₁₇NO₃Si |
| Molecular Weight | 221.145 g/mol |
| Appearance | Colorless to pale yellow transparent liquid |
| Purity (Typical) | ≥ 97% |
| Density (25 °C) | ~1.02 g/cm³ |
| Boiling Point | ~198–200 °C |
| Flash Point | ~96 °C (closed cup) |
| Solubility | Soluble in alcohols; hydrolyzes in water |
| Functional Group | Amino |
| Alkoxy Type | Trimethoxy |
| Shelf Life | 12 months (sealed, dry conditions) |
| Storage Conditions | Store in a cool, dry, well-ventilated place; protect from moisture |
Note: Specifications are subject to agreement and may be adjusted according to specific customer or application requirements.
| Property | Value |
|---|---|
| Chemical Name | 3-Aminopropyltrimethoxysilane |
| CAS No. | 13822-56-5 |
| Molecular Formula | C₆H₁₇NO₃Si |
| Molecular Weight | 221.145 g/mol |
| Appearance | Colorless to pale yellow transparent liquid |
| Odor | Mild amine-like |
| Density (25 °C) | ~1.02 g/cm³ |
| Boiling Point | ~198–200 °C |
| Flash Point (Closed Cup) | ~96 °C |
| Vapor Pressure (25 °C) | Low |
| Solubility | Soluble in alcohols and most organic solvents; hydrolyzes in water |
| Hydrolysis Behavior | Rapid hydrolysis of methoxy groups to silanols |
| Functional Groups | Amino (–NH₂), Trimethoxy silane |
| Reactivity | High; readily reacts with hydroxylated inorganic surfaces |
| Stability | Moisture sensitive; stable under dry, sealed conditions |
| Storage Temperature | Ambient, dry, well-ventilated environment |
Usage
Typical Dosage
Application Guidelines
Note:
Actual dosage and processing conditions should be optimized based on substrate type, resin system, and performance requirements.
GHS Classification
| Item | Description |
|---|---|
| Pictogram | Corrosion / Exclamation Mark |
| Signal Word | Danger |
| Hazard Statements | H302 – Harmful if swallowed H314 – Causes severe skin burns and eye damage |
Precautionary Statements
Prevention
Response
Storage
P405 – Store locked up
Disposal
P501 – Dispose of contents/container to an approved waste disposal facility
Regulatory Information
| Item | Details |
|---|---|
| RTECS No. | TX2100000 |
Transport Information
| Item | Details |
|---|---|
| UN Number | UN 2735 |
| Transport Hazard Class | Class 8 (Corrosive) |
| Packing Group | II |
| HS Code* | 2931.90-000 |
*HS code shown is for reference only. Actual HS codes may vary by country or region.
Notice
The information provided above is for reference purposes only and does not replace the Safety Data Sheet (SDS).
Users are responsible for compliance with applicable regulations and for ensuring safe handling, storage, transportation, and disposal.
Packaging: 500 g / 1 kg / 5 kg / 25 kg / 200 kg drums / 1000L IBC container (Customized packaging is available).
Storage:
Shelf Life: 12 months from date of manufacture when stored under recommended conditions.
“The information provided herein is based on general industry experience and is intended for reference purposes only. Actual performance and optimal usage conditions may vary depending on formulation, processing methods, substrate characteristics, and end-use requirements. Users are responsible for conducting their own tests and evaluations to determine suitability for their specific applications. No warranty, express or implied, is made regarding the completeness, accuracy, or applicability of this information.”
Grace Gao / Sales Manager
Email : Inquiry@SiliconChemicals.com
Tel : +86-133-3518-4513
WhatsApp : +8613335184513
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