Tetrabutyl orthosilicate
Also known as: Silane, tetrabutoxy-, Tetrabutoxysilane, Tetra-n-butoxysilane, Tetrabutyl silicate, Butyl orthosilicate, Silicon tetrabutoxide, Silicic acid tetrabutyl ester, Orthosilicic acid tetrabutyl ester
Tetrabutyl orthosilicate (CAS 4766-57-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H36O4Si and a molecular weight of 320.540 g/mol. Key properties include a melting point of -80 °C, a boiling point of 275.0±0.0 °C at 760 mmHg, a density of 0.9±0.1 g/cm3 and a flash point of 78.9±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 4766-57-8
- Jingsj CID
- J-9683-3
- Molecular Formula
- C16H36O4Si
- Molecular Weight
- 320.540 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | -80 °C |
|---|---|
| Boiling Point | 275.0±0.0 °C at 760 mmHg |
| Density | 0.9±0.1 g/cm3 |
| Flash Point | 78.9±0.0 °C |
| Exact Mass | 320.238281 |
| PSA | 36.92000 |
| LogP | 9.35 |
| Additional Property | >1 (vs air) |
| Vapor Pressure | 0.0±0.5 mmHg at 25°C |
| Refractive Index | 1.433 |
| Additional Property | reacts |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of Tetrabutyl orthosilicate?
The CAS number of Tetrabutyl orthosilicate is 4766-57-8.
What are the molecular formula and molecular weight of Tetrabutyl orthosilicate?
Tetrabutyl orthosilicate has molecular formula C16H36O4Si and molecular weight 320.540 g/mol.
Is Tetrabutyl orthosilicate hazardous?
Tetrabutyl orthosilicate has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
What are the upstream and downstream products of Tetrabutyl orthosilicate?
For Tetrabutyl orthosilicate, Upstream Products: 1-Butanol, Tetraethyl orthosilicate, Urea; Downstream Products: Tetrakis(trimethylsiloxy)silane, Tetrachlorosilane, 1-Bromobutane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Tetrabutyl orthosilicate (CAS 4766-57-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-9683-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.