2-Methyl-1,2-oxaphospholan-5-one 2-oxide

Also known as: 1,2-Oxaphospholan-5-one, 2-methyl-, 2-oxide, 2-METHYL-1,2-OXAPHOSPHOLAN-5-ONE 2-OXIDE, 2-Methyl-1,2-oxaphospholane 5-one 2-oxide, 2-Methyl-1,2-oxaphospholane-5-one 2-oxide, 2-Methyl-1-oxa-2,5-dioxo-2-phospholane, 2-Methyl-2,5-dioxo-1,2-oxaphospholan, 2-Methyl-5-oxo-1,2-oxaphospholane 2-oxide, 2-methyl-1,2-oxaphosphinolan-5-one-2-oxide, 2-methyl-2,5-dioxo-1,2-oxaphospholane, 2-methyl-2-oxo-1,2λ5-oxaphospholan-5-one, EINECS 239-225-6, Einecs 239-225-6, Exolit PE 110, Exolit PR 110

2-Methyl-1,2-oxaphospholan-5-one 2-oxide (CAS 15171-48-9) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C4H7O3P and a molecular weight of 134.070 g/mol. Key properties include a boiling point of 191.6±23.0 °C at 760 mmHg, a density of 1.3±0.1 g/cm3 and a flash point of 84.0±42.9 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 15171-48-9
Jingsj CID: J-1045442-9
Molecular Formula: C₄H₇O₃P
Molecular Weight: 134.070 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	191.6±23.0 °C at 760 mmHg
Density	1.3±0.1 g/cm3
Flash Point	84.0±42.9 °C
Exact Mass	134.013275
PSA	53.18000
LogP	0.84120
Vapor Pressure	0.5±0.4 mmHg at 25°C
Refractive Index	1.427

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of 2-Methyl-1,2-oxaphospholan-5-one 2-oxide?

The CAS number of 2-Methyl-1,2-oxaphospholan-5-one 2-oxide is 15171-48-9.

What are the molecular formula and molecular weight of 2-Methyl-1,2-oxaphospholan-5-one 2-oxide?

2-Methyl-1,2-oxaphospholan-5-one 2-oxide has molecular formula C4H7O3P and molecular weight 134.070 g/mol.

What are the upstream and downstream products of 2-Methyl-1,2-oxaphospholan-5-one 2-oxide?

For 2-Methyl-1,2-oxaphospholan-5-one 2-oxide, Upstream Products: Methyldichlorophosphine, Acrylic acid; Downstream Products: 3-Chloropropionyl chloride.

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. "2-Methyl-1,2-oxaphospholan-5-one 2-oxide (CAS 15171-48-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1045442-9 (accessed 2026-11-09).

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