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Diethyl chlorophosphite

Also known as: Chlorodiethoxyphosphine, Diethyl phosphorochloridite, Diethyl chloridophosphite, Chlorodiethyl phosphite, Ethyl phosphorochloridite, Phosphorochloridous acid, diethyl ester

Diethyl chlorophosphite (CAS 589-57-1) is a compound in the Organohalogen Compounds category listed in the Jingsj chemical database. It has the molecular formula C4H10ClO2P and a molecular weight of 156.54800 g/mol. Key properties include a boiling point of 153-155 °C(lit.), a density of 1.089 g/mL at 20 °C(lit.) and a flash point of 1.1 °C. It is classified under GHS with signal word Danger and hazard statements H225 — Highly flammable liquid and vapour, 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 Nov 2, 2026.

CAS No.
589-57-1
Jingsj CID
J-20339-4
Molecular Formula
C4H10ClO2P
Molecular Weight
156.54800 g/mol
Category
Organohalogen Compounds
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point153-155 °C(lit.)
Density1.089 g/mL at 20 °C(lit.)
Flash Point1.1 °C
Exact Mass156.01100
PSA32.05000
LogP2.52510
Refractive Indexn20/D 1.434(lit.)

GHS Safety & Compliance

Flammable / Corrosion / IrritantSignal word: Danger
  • H225 — Highly flammable liquid and vapour
  • H314 — Causes severe skin burns and eye damage
  • H335 — May cause respiratory irritation

Frequently Asked Questions

What is the CAS number of Diethyl chlorophosphite?

The CAS number of Diethyl chlorophosphite is 589-57-1.

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

Diethyl chlorophosphite has molecular formula C4H10ClO2P and molecular weight 156.54800 g/mol.

Is Diethyl chlorophosphite hazardous?

Diethyl chlorophosphite has GHS signal word Danger and hazard statements H225 — Highly flammable liquid and vapour; H314 — Causes severe skin burns and eye damage; H335 — May cause respiratory irritation.

What are the upstream and downstream products of Diethyl chlorophosphite?

For Diethyl chlorophosphite, Upstream Products: Triethyl phosphite, Ethyl phosphorodichloridite, Ethanol; Downstream Products: Triethyl 2-phosphonopropionate, Methyl chlorooxoacetate, Dimethyl oxalate.

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 chlorophosphite (CAS 589-57-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-20339-4 (accessed 2026-11-09).

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