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131903
Tetraethyl orthosilicate
reagent grade, 98%
Synonym(s):
Orthosilicic acid tetraethyl ester, Silicon tetraethoxide, TEOS, Tetraethoxysilane, Tetraethoxysilicon(IV), Tetraethyl silicate
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About This Item
grade
reagent grade
Quality Segment
vapor density
7.2 (vs air)
vapor pressure
<1 mmHg ( 20 °C)
assay
98%
form
liquid
refractive index
n20/D 1.382 (lit.)
bp
168 °C (lit.)
density
0.933 g/mL at 20 °C (lit.)
SMILES string
CCO[Si](OCC)(OCC)OCC
InChI
1S/C8H20O4Si/c1-5-9-13(10-6-2,11-7-3)12-8-4/h5-8H2,1-4H3
InChI key
BOTDANWDWHJENH-UHFFFAOYSA-N
General description
Application
- As a sol-gel precursor to synthesize SiO2-TiO2 anti-reflective self-cleaning coatings for solar cells.
- To fabricate nano silica functionalized crosslinked hybrid membranes for proton exchange membrane fuel cell applications. These membranes have better proton conductivity and thermal stability.
- To prepare poly(vinylidene fluoride)/TEOS matrix separator to enhance the performance of Li-ion batteries. The separator exhibits excellent electrolyte retention and wettability.
- An anti-solvent to fabricate an efficient perovskite layer for inverted planar solar cells with enhanced power conversion efficiency and reproducibility. TEOS helps to achieve high-quality perovskite films with reduced density of defects, and thus slower carrier recombination.
- As a precursor to prepare the xerogel.
Features and Benefits
- Excellent adhesion on substrates
- Uniform film deposition
- Cross-linker to introduce polymer strands into hydrogel
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This Item | |||
|---|---|---|---|
| description reagent grade, 98% | description packaged for use in deposition systems | description ≥99.0% (GC) | description 99.999% trace metals basis |
| assay 98% | assay ≥99.5% (GC) | assay ≥99.0% (GC) | assay 99.999% trace metals basis |
| form liquid | form liquid | form liquid | form liquid |
| grade reagent grade | grade - | grade - | grade - |
| density 0.933 g/mL at 20 °C (lit.) | density 0.933 g/mL at 20 °C (lit.) | density 0.933 g/mL at 20 °C (lit.) | density 0.933 g/mL at 20 °C (lit.) |
| vapor pressure <1 mmHg ( 20 °C) | vapor pressure <1 mmHg ( 20 °C) | vapor pressure <1 mmHg ( 20 °C) | vapor pressure <1 mmHg ( 20 °C) |
| vapor density 7.2 (vs air) | vapor density 7.2 (vs air) | vapor density 7.2 (vs air) | vapor density 7.2 (vs air) |
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signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - STOT SE 3
target_organs
Respiratory system
Storage Class
3 - Flammable liquids
flash_point_f
113.0 °F - closed cup
flash_point_c
45 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Regulatory Listings
Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.
78-10-4
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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
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Is anything else needed to use Product 131903, Tetraethyl Orthosilicate in a hydrolysis reaction?
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An acid or alkali catalyst is needed to do a hydrolysis reaction to free the silanol group for use.
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Product 131903, Tetraethyl orthosilicate is commonly used as a precursor to prepare xerogel. What is xerogel?
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A xerogel is a solid formed from a gel by drying with unhindered shrinkage. Xerogel usually retains high porosity and large surfaced area, along with very small pore size.
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How can I purify Product 131903, Tetraethyl Orthosilicate?
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Fractionate through an 80cm Podbielniak type column with heated jacket and partial take-off head. [Purification of Laboratory Chemicals Fourth Ed]
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What is the Department of Transportation shipping information for this product?
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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.
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What is the freezing point of Product 131903, Tetraethyl Orthosilicate?
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The freezing point is ~85°C.
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What is the solubility of Product 131903, Tetraethyl Orthosilicate?
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According to the 13th Edition of the chemicals encyclopedia published by the Royal Society of Chemistry, Tetraethyl Orthosilicate is practically insoluble in water and is slowly decomposed by it. It is miscible with alcohol.
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