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Triethylphosphine

Also known as: triethylphosphane, Phosphine, triethyl-, Phosphorus triethyl, (C2H5)3P, AURORA KA-1111, CYTOP 320

Triethylphosphine (CAS 554-70-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C6H15P and a molecular weight of 118.157 g/mol. Key properties include a melting point of -3ºC, a boiling point of 126.5±9.0 °C at 760 mmHg, a density of 0.88 g/mL at 20 °C and a flash point of 27.2±25.0 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, H250 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.
554-70-1
Jingsj CID
J-35841-8
Molecular Formula
C6H15P
Molecular Weight
118.157 g/mol
Category
Organic Compounds
Last updated
8/21/2026
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Physicochemical Properties

Melting Point-3ºC
Boiling Point126.5±9.0 °C at 760 mmHg
Density0.88 g/mL at 20 °C
Flash Point27.2±25.0 °C
Exact Mass118.091133
PSA13.59000
LogP2.41
Vapor Pressure14.1±0.2 mmHg at 25°C
Refractive Indexn20/D 1.456(lit.)

GHS Safety & Compliance

Flammable / CorrosionSignal word: Danger
  • H225 — Highly flammable liquid and vapour
  • H250
  • H314 — Causes severe skin burns and eye damage

Frequently Asked Questions

What is the CAS number of Triethylphosphine?

The CAS number of Triethylphosphine is 554-70-1.

What are the molecular formula and molecular weight of Triethylphosphine?

Triethylphosphine has molecular formula C6H15P and molecular weight 118.157 g/mol.

Is Triethylphosphine hazardous?

Triethylphosphine has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H250; H314 — Causes severe skin burns and eye damage.

What are the upstream and downstream products of Triethylphosphine?

For Triethylphosphine, Upstream Products: Ethylmagnesium bromide, Tetraethylphosphonium iodide; Downstream Products: Trimethylamine, Triethylphosphine oxide, triethylphosphine sulfide.

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

Last updated:

How to cite: Jingsj. "Triethylphosphine (CAS 554-70-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-35841-8 (accessed 2026-11-09).

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