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Tantalum(V) methoxide

Also known as: Tantalum pentamethoxide, Tantalum methoxide, Tantalum methylate, Pentamethoxytantalum, Methanol, tantalum(5+) salt, Tantalum(5+) methoxide, Tantalum(V) methoxide (99.99+%-Ta) PURATREM, TantalumVmethoxidewhitepowder, methanolate, tantalum(5+)

Tantalum(V) methoxide (CAS 865-35-0) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C5H15O5Ta and a molecular weight of 336.11800 g/mol. Key properties include a melting point of 49-51°C, a boiling point of 188-190°C 10mm and a flash point of 189°C/10mm. It is classified under GHS with signal word Danger and hazard statements H228, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
865-35-0
Jingsj CID
J-48094-5
Molecular Formula
C5H15O5Ta
Molecular Weight
336.11800 g/mol
Category
Solvents
Last updated
8/21/2026
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Physicochemical Properties

Melting Point49-51°C
Boiling Point188-190°C 10mm
Flash Point189°C/10mm
Exact Mass336.04000
PSA46.15000
LogP0.48550

GHS Safety & Compliance

Flammable / IrritantSignal word: Danger
  • H228
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Customs & Trade Information

HS Code2909199090
Summary2909199090. other acyclic ethers and their halogenated, sulphonated, nitrated or nitrosated derivatives. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:5.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Tantalum(V) methoxide?

The CAS number of Tantalum(V) methoxide is 865-35-0.

What are the molecular formula and molecular weight of Tantalum(V) methoxide?

Tantalum(V) methoxide has molecular formula C5H15O5Ta and molecular weight 336.11800 g/mol.

Is Tantalum(V) methoxide hazardous?

Tantalum(V) methoxide has GHS signal word Danger and hazard statements H228; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

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

Last updated:

How to cite: Jingsj. "Tantalum(V) methoxide (CAS 865-35-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48094-5 (accessed 2026-11-06).

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