Diethyl (tosyloxy)methylphosphonate

Also known as: Diethyl p-toluenesulfonyloxymethylphosphonate, Diethyl p-tosyloxymethylphosphonate, DESMP, DETP, [[[(4-Tolyl)sulfonyl]oxy]methyl]phosphonic acid diethyl ester, Toluene-4-sulfonic acid diethoxyphosphorylmethyl ester, (Diethoxyphosphoryl)methyl 4-methylbenzenesulfonate, Phosphonic acid, P-[[[(4-methylphenyl)sulfonyl]oxy]methyl]-, diethyl ester

Diethyl (tosyloxy)methylphosphonate (CAS 31618-90-3) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C12H19O6PS and a molecular weight of 322.314 g/mol. Key properties include a boiling point of 441.7±28.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 220.9±24.0 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 31618-90-3
Jingsj CID: J-1522642-3
Molecular Formula: C₁₂H₁₉O₆PS
Molecular Weight: 322.314 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	441.7±28.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	220.9±24.0 °C
Exact Mass	322.063995
PSA	97.09000
LogP	1.51
Vapor Pressure	0.0±1.0 mmHg at 25°C
Refractive Index	1.498
Storage Conditions	Refrigerator, Under Inert Atmosphere

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Diethyl (tosyloxy)methylphosphonate?

The CAS number of Diethyl (tosyloxy)methylphosphonate is 31618-90-3.

What are the molecular formula and molecular weight of Diethyl (tosyloxy)methylphosphonate?

Diethyl (tosyloxy)methylphosphonate has molecular formula C12H19O6PS and molecular weight 322.314 g/mol.

What are the upstream and downstream products of Diethyl (tosyloxy)methylphosphonate?

For Diethyl (tosyloxy)methylphosphonate, Upstream Products: Formaldehyde, Diethyl phosphite, p-Toluenesulfonyl chloride; Downstream Products: Diethyl [(phenylthio)methyl]phosphonate, (R)-9-[2-(DIETHYLPHOSPHONOMETHOXY)PROPYL]ADENINE, Diethyl methylphosphonate.

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. "Diethyl (tosyloxy)methylphosphonate (CAS 31618-90-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1522642-3 (accessed 2026-11-09).

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