Skip to main content
Jingsj
.mol.sdf

Diethyl ethylphosphonate

Also known as: Diethoxyethylphosphine oxide, Ethylphosphonic acid diethyl ester, Diethyl ethanephosphonate, NSC 2671, 1-[ethoxy(ethyl)phosphoryl]oxyethane

Diethyl ethylphosphonate (CAS 78-38-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H15O3P and a molecular weight of 166.15500 g/mol. Key properties include a boiling point of 198 ºC, a density of 1.010 and a flash point of 93 ºC. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed, H318 — Causes serious eye damage and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
78-38-6
Jingsj CID
J-18309-5
Molecular Formula
C6H15O3P
Molecular Weight
166.15500 g/mol
Category
Organic Acids
Last updated
8/21/2026
Request MSDS / TDS

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point198 ºC
Density1.010
Flash Point93 ºC
Exact Mass166.07600
PSA45.34000
LogP2.27240
Refractive Index1.422
StabilityStable, but hydrolyzes under both acidic and basic conditions. Incompatible with strong oxidizing agents.

GHS Safety & Compliance

Corrosion / Irritant / Environmental HazardSignal word: Danger
  • H302 — Harmful if swallowed
  • H318 — Causes serious eye damage
  • H411 — Toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of Diethyl ethylphosphonate?

The CAS number of Diethyl ethylphosphonate is 78-38-6.

What are the molecular formula and molecular weight of Diethyl ethylphosphonate?

Diethyl ethylphosphonate has molecular formula C6H15O3P and molecular weight 166.15500 g/mol.

Is Diethyl ethylphosphonate hazardous?

Diethyl ethylphosphonate has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H318 — Causes serious eye damage; H411 — Toxic to aquatic life with long lasting effects.

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

Last updated:

How to cite: Jingsj. "Diethyl ethylphosphonate (CAS 78-38-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18309-5 (accessed 2026-11-09).

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