Tungsten(VI) oxychloride

Also known as: Tungsten oxychloride, Tungsten oxytetrachloride, Tungsten(VI) oxide chloride, Tungsten tetrachloride oxide, Tetrachloride(oxo)tungsten(VI), trans-Tungsten(VI) oxotetrachloride, Wolfram(VI) tetrachlorideoxide, Tungsten chloride oxide (WCl4O)

Tungsten(VI) oxychloride (CAS 13520-78-0) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula Cl4OW and a molecular weight of 341.65100 g/mol. Key properties include a melting point of 211ºC(lit.), a boiling point of 337ºC and a density of 11.920. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 13520-78-0
Jingsj CID: J-24633-3
Molecular Formula: Cl₄OW
Molecular Weight: 341.65100 g/mol
Category: Inorganic Chemicals
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	211ºC(lit.)
Boiling Point	337ºC
Density	11.920
Exact Mass	339.82100
PSA	17.07000
LogP	2.63920
Appearance	red hygroscopic crystals
Additional Property	decomposed by H2O; soluble CS2, benzene [KIR83] [HAW93]

GHS Safety & Compliance

Corrosion / IrritantSignal word: Danger

H314 — Causes severe skin burns and eye damage
H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of Tungsten(VI) oxychloride?

The CAS number of Tungsten(VI) oxychloride is 13520-78-0.

What are the molecular formula and molecular weight of Tungsten(VI) oxychloride?

Tungsten(VI) oxychloride has molecular formula Cl4OW and molecular weight 341.65100 g/mol.

Is Tungsten(VI) oxychloride hazardous?

Tungsten(VI) oxychloride has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage; H335 — May cause respiratory irritation.

What are the upstream and downstream products of Tungsten(VI) oxychloride?

For Tungsten(VI) oxychloride, Upstream Products: Methoxytrimethylsilane, hexachlorotungsten, Thionyl chloride; Downstream Products: Tungsten dichloride dioxide, Chlorotrimethylsilane.

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. "Tungsten(VI) oxychloride (CAS 13520-78-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24633-3 (accessed 2026-11-09).

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