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Diethyl (4-methylbenzyl)phosphonate

Also known as: Diethyl 4-methylbenzylphosphonate, (4-Methylbenzyl)phosphonic acid diethyl ester, Diethyl p-tolylmethylphosphonate, Phosphonic acid, [(4-methylphenyl)methyl]-, diethyl ester, [(4-Methylphenyl)methyl]phosphonic acid diethyl ester, 1-(diethoxyphosphorylmethyl)-4-methylbenzene, (p-Methylbenzyl)phosphonic acid diethyl ester, Diethyl (p-methylbenzyl)phosphonate

Diethyl (4-methylbenzyl)phosphonate (CAS 3762-25-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H19O3P and a molecular weight of 242.25100 g/mol. Key properties include a boiling point of 110 °C0.2 mm Hg(lit.), a density of 1.07 g/mL at 25 °C(lit.) and a flash point of 110.0 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 2, 2026.

CAS No.
3762-25-2
Jingsj CID
J-42520-7
Molecular Formula
C12H19O3P
Molecular Weight
242.25100 g/mol
Category
Organic Acids
Last updated
11/2/2026
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Physicochemical Properties

Boiling Point110 °C0.2 mm Hg(lit.)
Density1.07 g/mL at 25 °C(lit.)
Flash Point110.0 °C
Exact Mass242.10700
PSA45.34000
LogP3.76110
Refractive Indexn20/D 1.497(lit.)

Customs & Trade Information

HS Code2931900090
Summary2931900090. 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 (4-methylbenzyl)phosphonate?

The CAS number of Diethyl (4-methylbenzyl)phosphonate is 3762-25-2.

What are the molecular formula and molecular weight of Diethyl (4-methylbenzyl)phosphonate?

Diethyl (4-methylbenzyl)phosphonate has molecular formula C12H19O3P and molecular weight 242.25100 g/mol.

What are the upstream and downstream products of Diethyl (4-methylbenzyl)phosphonate?

For Diethyl (4-methylbenzyl)phosphonate, Upstream Products: 4-Methylbenzyl bromide, Triethyl phosphite, Diethyl phosphite; Downstream Products: 1-Methyl-4-((E)-styryl)-benzene, (4-Methylbenzyl)phosphonic acid, Diethyl (4-formylbenzyl)phosphonate.

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 (4-methylbenzyl)phosphonate (CAS 3762-25-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-42520-7 (accessed 2026-11-09).

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