Butyltrichlorosilane

Also known as: Trichlorobutylsilane, n-Butyltrichlorosilane, Butyl silicontrichloride, Butyl(trichloro)silane, Silane, butyltrichloro-, Trichloro-n-butylsilane, NSC 93881

Butyltrichlorosilane (CAS 7521-80-4) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C4H9Cl3Si and a molecular weight of 191.559 g/mol. Key properties include a boiling point of 147.7±3.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 45.6±0.0 °C. It is classified under GHS with signal word Danger and hazard statements H226 — Flammable liquid and vapour, H302 — Harmful if swallowed and H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 7521-80-4
Jingsj CID: J-6763-0
Molecular Formula: C₄H₉Cl₃Si
Molecular Weight: 191.559 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	147.7±3.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	45.6±0.0 °C
Exact Mass	189.953903
LogP	5.78
Vapor Pressure	5.5±0.3 mmHg at 25°C
Refractive Index	1.446

GHS Safety & Compliance

Flammable / Corrosion / IrritantSignal word: Danger

H226 — Flammable liquid and vapour
H302 — Harmful if swallowed
H314 — Causes severe skin burns and eye damage

Frequently Asked Questions

What is the CAS number of Butyltrichlorosilane?

The CAS number of Butyltrichlorosilane is 7521-80-4.

What are the molecular formula and molecular weight of Butyltrichlorosilane?

Butyltrichlorosilane has molecular formula C4H9Cl3Si and molecular weight 191.559 g/mol.

Is Butyltrichlorosilane hazardous?

Butyltrichlorosilane has GHS signal word Danger and hazard statements H226 — Flammable liquid and vapour; H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of Butyltrichlorosilane?

For Butyltrichlorosilane, Upstream Products: Butylmagnesium bromide, 1-Bromobutane, Trichlorosilane; Downstream Products: Butylsilane, Butyltrimethylsilane, Butyl(chloro)dimethylsilane.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Butyltrichlorosilane (CAS 7521-80-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6763-0 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.