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  • 440140 - (3-Aminopropyl)triethoxysilane

440140 Aldrich



Synonym: 3-Triethoxysilylpropylamine, APTES, APTS



Related Categories Chemical Synthesis, Materials Science, Micro/NanoElectronics, Organometallic Reagents, Organosilicon,
assay   99%
form   liquid
bp   217 °C/760 mmHg(lit.)
density   0.946 g/mL at 25 °C(lit.)


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


Forms aminopropyl derivative of glass, an adsorbent for affinity chromatography. Used to prepare positively charged slides suitable for use with various immunohistochemical and in situ hybridization procedures. Recently (3-Aminopropyl)triethoxysilane has been used to prepare dye-doped silica nanoparticles with minimal aggregation and minimal nonspecific binding with biomolecules.

Used in a preparation of a series of tenary composite films of polyimide/SiO/polydiphenylsiloxane with good optical transparency.


100, 500 mL in Sure/Seal™

Price and Availability

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN 2735PSN1 8 / PGII
WGK Germany 
Flash Point(F) 
199.4 °F
Flash Point(C) 
93 °C

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
What is the viscosity of Product 440140, APTES (3-Aminopropyl)triethoxysilane)?
According to our supplier’s information the viscosity is 1.6 cS.
What is Product 440140, APTES (3-Aminopropyl)triethoxysilane) soluble in?
This product is soluble in water.
How should Product 440140, APTES (3-Aminopropyl)triethoxysilane) be stored?
We would recommend storing this product in accordance with our MSDS, which recommends storing at room temperature and under inert gas since this product is moisture sensitive.
What is the refractive index of Product 440140, APTES (3-Aminopropyl)triethoxysilane)?
According to our supplier the refractive index is 1.420.
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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