The vapor pressure reported for this product is less than 7 hPa at 20 °C (68 °F). Vapor pressure data is not available for this material at 40 °C, 80 °C, and 110 °C. The vapor pressure can be estimated using the Clausius-Clapeyron equation, which relates the vapor pressure of a liquid to its temperature. The formula is: ln(P₁/P₂) = -ΔHvap/R * (1/T₁ - 1/T₂) where P₁ and P₂ are pressures at different temperatures T₁ and T₂. The gas constant is R = 8.315 J⋅K−1⋅mol−1, and the heat of vaporization ΔHvap is approximately 41.645 ± 3.00 kJ/mol (according to Sci-Finder).
175617
(3-Mercaptopropyl)trimethoxysilane
95%
Synonym(s):
3-(Trimethoxysilyl)-1-propanethiol
Sign In to View Organizational & Contract Pricing.
Select a Size
Change View
| Size/SKU | Availability | Price |
|---|---|---|
25 g | Check Cart for Availability | $68.00 |
100 g | Please contact Customer Service for Availability | $203.00 |
500 g | Please contact Customer Service for Availability | $729.00 |
About This Item
Linear Formula:
HS(CH2)3Si(OCH3)3
CAS Number:
Molecular Weight:
196.34
UNSPSC Code:
12352103
NACRES:
NA.23
PubChem Substance ID:
EC Number:
224-588-5
Beilstein/REAXYS Number:
2038119
MDL number:
Quality Segment
assay
95%
form
liquid
refractive index
n20/D 1.444 (lit.)
bp
213-215 °C (lit.)
density
1.057 g/mL at 25 °C (lit.)
storage temp.
2-8°C
SMILES string
CO[Si](CCCS)(OC)OC
InChI
1S/C6H16O3SSi/c1-7-11(8-2,9-3)6-4-5-10/h10H,4-6H2,1-3H3
InChI key
UUEWCQRISZBELL-UHFFFAOYSA-N
General description
This 95% pure organofunctional silane is the industry standard for adhesion promotion. Its bifunctional nature (thiol/trimethoxysilyl) ensures robust chemical bonding at interfaces. The 5% impurity profile typically consists of harmless siloxane oligomers that do not compromise its performance in high-strength bonding or composite manufacturing.
Application
- Coupling & Adhesion: Acts as a powerful "molecular bridge" to improve the adhesion between sulfur-vulcanized rubbers or organic polymers and inorganic substrates like silica or glass.
- Filler Treatment: Used to treat mineral fillers (like silica) to improve their dispersion and reinforcement within polymer matrices.
- Composite Enhancement: Integrated into epoxy or phenolic resins to increase mechanical strength and moisture resistance in industrial composites.
1 of 1
This Item | |||
|---|---|---|---|
| refractive index n20/D 1.444 (lit.) | refractive index n20/D 1.424 (lit.) | refractive index n20/D 1.419 (lit.) | refractive index n20/D 1.429 (lit.) |
| density 1.057 g/mL at 25 °C (lit.) | density 1.027 g/mL at 25 °C (lit.) | density 1.09 g/mL at 25 °C (lit.) | density 1.07 g/mL at 25 °C (lit.) |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
| bp 213-215 °C (lit.) | bp 91-92 °C/15 mmHg (lit.) | bp 195 °C/750 mmHg (lit.) | bp 120 °C/2 mmHg (lit.) |
| assay 95% | assay 97% | assay ≥97% | assay ≥98% |
| storage temp. 2-8°C | storage temp. - | storage temp. - | storage temp. - |
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Aquatic Chronic 2 - Skin Sens. 1
Storage Class
10 - Combustible liquids
wgk
WGK 2
flash_point_f
204.8 °F - closed cup
flash_point_c
96 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Choose from one of the most recent versions:
Already Own This Product?
Find documentation for the products that you have recently purchased in the Document Library.
-
Can you indicate the vapor pressure of this product, e.g. at room temperature, 40°C, 80°C and/or 110°C? Any formula or other indication would also be appreciated
1 answer-
Helpful?
-
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfHelpful?
-
-
Is this the only composition of (3-mercapropyl) trimethoxysilane (MPTMS)? Or is it mixed with dispersion such as ethanol?
1 answer-
This product is a neat or pure liquid that has not been diluted in a solvent. The material has a density of 1.057 g/mL and a minimum purity of 95%.
Helpful?
-
-
How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
Helpful?
-
-
How to dissolve (3-mercaptopropyl)trimethoxysilane (MPTMS) solid into liquid?
1 answer-
The solubility of this product has not been determined. However, various sources state that this material is soluble in water, ethanol, methanol, isopropanol, toluene, xylene, and benzene. No rate is provided. This information has not been validated.
Helpful?
-
-
If I stored it in room temperature, I couldn't use it anymore?
1 answer-
The recommended storage temperature is 2-8°C. This product is shipped at ambient temperature. We typically allow one to two weeks transit time before we expect degradation for products shipped in this manner. For extended periods or unsealed products, the end-user should examine the material for suitability.
Helpful?
-
-
Is Product 175617, (3-Mercaptopropyl)trimethoxysilane, a liquid?
1 answer-
Yes, 175617 is a liquid. The density is 1.057 g/mL at 25 °C(lit.). For example, the 25G package contains 23.7mL.
Helpful?
-
-
What is the boiling point of Product 175617, (3-Mercaptopropyl)trimethoxysilane?
1 answer-
The boiling point for this product is 213-215°C.
Helpful?
-
-
What is the purity of Product 175617, (3-Mercaptopropyl)trimethoxysilane?
1 answer-
The purity is lot specific, but it will not be less than 94% as stated on the Specification Sheet.
Helpful?
-
-
What is the Department of Transportation shipping information for this product?
1 answer-
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.
Helpful?
-