Tetrapropyl orthosilicate
Tetrapropyl orthosilicate (CAS: 682-01-9) is an organosilicon compound with the linear formula (CH3CH2CH2O)4Si and a molecular weight of 264.43 g/mol. This clear liquid serves as a precursor in materials science, particularly for solution deposition techniques. It finds applications in chemical synthesis and micro/nanoelectronics due to its role in creating silicon-based materials and coatings.
- IUPAC
- Tetrapropoxysilane
- Synonyms
- Tetrapropoxysilane

Solution Deposition Precursor
Tetrapropyl orthosilicate is utilised as a precursor in solution deposition methods for creating thin films and coatings. Its controlled hydrolysis and condensation allow for the formation of silica-based materials with specific properties.
Chemical Synthesis
As an organosilicon compound, it can be employed as a reagent or building block in various organic and inorganic synthesis pathways. Its structure offers a route to incorporate silicon into complex molecules or materials.
Materials Science
This compound is valuable in materials science for the development of novel materials. It can be used in the sol-gel process to produce silica gels, xerogels, and porous silica structures.
Micro/Nanoelectronics
Tetrapropyl orthosilicate serves as a precursor in the microelectronics industry, potentially for depositing dielectric layers or passivation coatings. Its use in solution deposition is advantageous for fabricating nanoscale electronic components.
| Molecular weight | 264.43 |
|---|---|
| Linear formula | (CH3CH2CH2O)4Si |
| Assay | 95% |
| Form | liquid |
| Boiling point | 94 °C/5 mmHg(lit.) |
| Density | 0.916 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.4(lit.) |
| Vapour density | >1 (vs air) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 95 °C / 203 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 Tetrapropyl orthosilicate used for?
+
Tetrapropyl orthosilicate is primarily used as a precursor in solution deposition techniques for materials science and micro/nanoelectronics, and in general chemical synthesis.
What is the CAS number and formula for Tetrapropyl orthosilicate?
+
The CAS number is 682-01-9 and the linear formula is (CH3CH2CH2O)4Si.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Tetrapropyl orthosilicate with an assay of 95%. This product is not classified as USP, BP, or EP grade.
What are the main safety hazards associated with Tetrapropyl orthosilicate?
+
Tetrapropyl orthosilicate is classified with GHS07 symbol and a Warning signal word. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Appropriate personal protective equipment, including eyeshields and gloves, should be used.
How is Tetrapropyl orthosilicate packed and shipped?
+
Tetrapropyl orthosilicate is typically supplied as a liquid. Tech Serve Solutions is a global supplier, exporter, and exporter of fine chemicals.
How can I request a sample or quote for Tetrapropyl orthosilicate?
+
Please contact Tech Serve Solutions directly to request a sample or obtain a quote for Tetrapropyl orthosilicate.
▶ Related products

(3-Cyanophenyl)boronic acid, neopentyl glycol ester
Organometallic Reagents

(6-Methyl-5-quinolinyl)boronic acid
C10H10BNO2
Organometallic Reagents
2-Pyridineboronic acid
C5H6BNO2
Organometallic Reagents
4-(Phenylethynyl)phenylboronic acid pinacol ester
C20H21BO2
Organometallic Reagents
4-Biphenylboronic acid
C6H5C6H4B(OH)2
Organometallic Reagents
Imidazole-2-boronic acid
C3H5BN2O2
Organometallic Reagents
Methyl(3,3,3-trifluoropropyl)cyclopolysiloxanes, mixture of tri- and tetra-
Organometallic Reagents

Methyl-tripropoxysilane
CH3Si(OCH2CH2CH3)3
Organometallic Reagents▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis