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Methylphenylphosphinic acid

Also known as: Methylphenylphosphonic acid, Phosphinic acid, P-methyl-P-phenyl-, methyl(phenyl)phosphinic acid, NSC 403102

Methylphenylphosphinic acid (CAS 4271-13-0) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C7H9O2P and a molecular weight of 156.11900 g/mol. Key properties include a melting point of 132-134ºC, a boiling point of 373.9ºC at 760 mmHg, a density of 1.2g/cm3 and a flash point of 179.9ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
4271-13-0
Jingsj CID
J-16592-4
Molecular Formula
C7H9O2P
Molecular Weight
156.11900 g/mol
Category
Solvents
Last updated
8/21/2026
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Physicochemical Properties

Melting Point132-134ºC
Boiling Point373.9ºC at 760 mmHg
Density1.2g/cm3
Flash Point179.9ºC
Exact Mass156.03400
PSA47.11000
LogP1.21210
Refractive Index1.522

Customs & Trade Information

HS Code2916399090
Summary2916399090 other aromatic monocarboxylic acids, their anhydrides, halides, peroxides, peroxyacids and their derivatives VAT:17.0% Tax rebate rate:9.0% Supervision conditions:none MFN tariff:6.5% General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Methylphenylphosphinic acid?

The CAS number of Methylphenylphosphinic acid is 4271-13-0.

What are the molecular formula and molecular weight of Methylphenylphosphinic acid?

Methylphenylphosphinic acid has molecular formula C7H9O2P and molecular weight 156.11900 g/mol.

What are the upstream and downstream products of Methylphenylphosphinic acid?

For Methylphenylphosphinic acid, Upstream Products: Dichlorophenylphosphine, methylphenylphosphinic chloride, Phenylphosphonic dichloride; Downstream Products: methylphenylphosphinic chloride.

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

Last updated:

How to cite: Jingsj. "Methylphenylphosphinic acid (CAS 4271-13-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-16592-4 (accessed 2026-11-09).

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