(3-Aminopropyl)triethoxysilane
(3-Aminopropyl)triethoxysilane (CAS: 919-30-2, Formula: H2N(CH2)3Si(OC2H5)3) is a versatile organosilane with a molecular weight of 221.37 g/mol. It functions as a coupling agent, promoting adhesion between inorganic materials and organic polymers. Its applications span various industries, including adhesives, sealants, coatings, and composites, where it enhances material properties and durability. TSS supplies this chemical for research and industrial applications.
- IUPAC
- 3-Triethoxysilylpropylamine,APTES,APTS
- Synonyms
- 3-TriethoxysilylpropylamineAPTESAPTS

Adhesion Promoter
Enhances the bond strength between organic resins and inorganic substrates in adhesives and sealants, improving overall product performance and longevity.
Surface Modifier
Used to modify the surfaces of inorganic fillers and reinforcements, improving their compatibility with polymer matrices in composites and coatings.
Coupling Agent
Facilitates the integration of dissimilar materials, such as glass fibres in plastics, leading to improved mechanical properties and durability.
Chemical Synthesis
Serves as a building block in the synthesis of various organosilicon compounds and functionalised materials for specialised applications.
| Molecular weight | 221.37 |
|---|---|
| Linear formula | H2N(CH2)3Si(OC2H5)3 |
| Assay | ≥98% |
| Grade | purum |
| Boiling point | 217 °C/760 mmHg(lit.) |
| Density | 0.946 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.421 |


Hazard statements
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 93 °C / 199.4 °F |
| Transport (UN / ADR) | UN 2735PSN1 8 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-34-43 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is (3-Aminopropyl)triethoxysilane used for?
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(3-Aminopropyl)triethoxysilane is primarily used as an adhesion promoter, coupling agent, and surface modifier in industries such as adhesives, sealants, coatings, and composites. It is also employed in chemical synthesis.
What are the CAS number and formula for (3-Aminopropyl)triethoxysilane?
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The CAS number for (3-Aminopropyl)triethoxysilane is 919-30-2, and its molecular formula is H2N(CH2)3Si(OC2H5)3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (3-Aminopropyl)triethoxysilane with a minimum assay of ≥98% in purum grade. We do not represent this product as USP, BP, or EP grade.
How should (3-Aminopropyl)triethoxysilane be handled?
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(3-Aminopropyl)triethoxysilane is corrosive and can cause severe skin burns and eye damage (H314). It may also cause an allergic skin reaction (H317). Always wear appropriate personal protective equipment, including gloves, goggles, and face shields, and handle in a well-ventilated area.
How is this chemical packed, shipped, and exported?
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Tech Serve Solutions packs and ships (3-Aminopropyl)triethoxysilane in compliance with international regulations for hazardous materials, ensuring safe and secure export worldwide. Specific packaging details are available upon request.
How can I request a quote or sample?
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To request a quote or sample of (3-Aminopropyl)triethoxysilane, please contact our sales team through the website or provide your details via the enquiry form.
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