3-Aminopropyltriethoxysilane (APTES), ≥97%, is an amino-functional organosilane used to modify glass, silica, and other hydroxylated inorganic surfaces. Its triethoxysilane group supports attachment to compatible surfaces, while the terminal primary amine introduces reactive aminopropyl functionality for subsequent coupling or surface-treatment workflows.
Synonyms: APTES; APTS; (3-Aminopropyl)triethoxysilane; 3-Triethoxysilylpropylamine.
In the presence of controlled moisture, the ethoxy groups hydrolyze to form silanol groups that can interact and condense with hydroxylated surfaces. The resulting amine-functional surface may provide improved adhesion and increased interaction with anionic materials.
Product 01983 has a minimum chemical purity of 97% and may be evaluated for silanization, surface functionalization, adhesion promotion, and coupling between compatible inorganic surfaces and organic materials.
Key Properties
- Amino-functional organosilane coupling agent
- Minimum chemical purity: 97%
- CAS number: 919-30-2
- Linear formula: H2N(CH2)3Si(OC2H5)3
- Molecular weight: 221.37 g/mol
- Boiling point: 217°C
- Product number: 01983
Applications
Glass & Silica Surface Functionalization
APTES is used to introduce aminopropyl groups onto compatible glass, silica, and other hydroxylated inorganic surfaces.
Silane Coupling
May be used as a coupling agent in research involving adhesion or interfacial compatibility between inorganic surfaces and compatible organic polymers, coatings, or resins.
Adhesion Promotion
Amine-functional surface treatment may improve adhesion in compatible coating, adhesive, composite, and materials-research systems.
Particle & Substrate Modification
Suitable for evaluation in the functionalization of silica particles, glass substrates, and compatible metal-oxide surfaces requiring accessible primary amine groups.
Subsequent Chemical Coupling
The introduced amine groups provide reactive sites for further modification with appropriately selected amine-reactive compounds.
Compatibility & Surface-Treatment Considerations
- Designed for compatible hydroxylated surfaces such as glass and silica
- Hydrolysis and condensation depend on moisture, solvent, pH, temperature, and treatment time
- Surface cleanliness and hydroxyl availability can affect silanization performance
- Compatibility should be evaluated with substrates, solvents, coatings, resins, and coupling reagents
The resulting surface chemistry and treatment uniformity depend on the substrate and application conditions. Establish the appropriate concentration and processing protocol through small-scale testing.
Application Tips
- Clean and prepare the surface before silane treatment
- Control moisture carefully during solution preparation and application
- Optimize concentration, solvent, treatment time, and curing conditions for the selected substrate
- Confirm surface modification using an appropriate analytical method
Handling & Storage
- Store at room temperature
- Keep the container tightly closed when not in use
- Handle with protective gloves and chemical goggles in a fume hood
- Protect the product from uncontrolled moisture exposure during storage and dispensing
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FAQ
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1. What is 3-Aminopropyltriethoxysilane?
3-Aminopropyltriethoxysilane, commonly abbreviated APTES, is an amino-functional organosilane used to introduce reactive aminopropyl groups onto compatible hydroxylated surfaces.
2. What is APTES used for?
APTES is used in silanization, surface functionalization, adhesion promotion, particle modification, and coupling workflows involving compatible glass, silica, metal-oxide, polymer, coating, or resin systems.
3. What surfaces can APTES modify?
APTES is commonly used with hydroxylated inorganic surfaces, including glass and silica. Compatibility and treatment conditions should be validated for each substrate.
4. What is the CAS number for APTES?
The CAS number for 3-Aminopropyltriethoxysilane is 919-30-2.
5. How does APTES functionalize a surface?
Under controlled conditions, the ethoxy groups hydrolyze to silanol groups that can condense with compatible hydroxylated surfaces. The terminal amine remains available for subsequent interaction or chemical coupling.
6. How should product 01983 be stored and handled?
Store product 01983 at room temperature with the container tightly closed. Handle it with protective gloves and chemical goggles in a fume hood.
Safety & Documentation
Product 01983 is classified as corrosive. Handle it in a fume hood while wearing protective gloves and chemical goggles. Review the Safety Data Sheet, product specification, and lot-specific Certificate of Analysis before use for complete safety, storage, handling, and quality information.
