Description

Phosphoric Acid, Monomethyl Monophenyl Ester is a specialized organophosphorus compound that serves as a versatile intermediate and functional additive. Its unique structure, combining both methyl and phenyl ester groups on a phosphoric acid backbone, provides valuable properties for synthesis and material modification. This chemical is essential for manufacturers in the polymer, agrochemical, and specialty chemical industries seeking to enhance product performance or develop new formulations.

Application

• Polymer Industry: Acts as a flame retardant intermediate and a potential plasticizer or stabilizer precursor for PVC and other polymers.
• Agrochemical Synthesis: Serves as a key building block in the production of certain organophosphate pesticides and herbicides.
• Lubricant & Hydraulic Fluid Additives: Used in the formulation of anti-wear and extreme pressure (EP) additives.
• Metal Extraction & Treatment: Functions as a chelating agent or solvent extractant in hydrometallurgical processes for rare earth and other metals.
• Pharmaceutical Intermediates: Employed in the synthesis of specific active pharmaceutical ingredients (APIs) and prodrugs.
• Surface Treatment Agents: Used as a component in corrosion inhibitors or adhesion promoters for metal surfaces.

Basic Information

Product Name	Phosphoric Acid, Monomethyl Monophenyl Ester
CAS No.	4009-39-6
Molecular Formula	C7H9O4P
Molecular Weight	188.12 g/mol
Synonyms	Methyl phenyl phosphate; Phenyl methyl phosphate; Monomethyl monophenyl phosphate; Phosphoric acid methyl phenyl ester; Methyl monophenyl phosphate; Phenyl acid phosphate methyl ester; (Methoxy)(phenoxy)phosphinic oxide
EINECS	223-633-3

Quality Control

Our Phosphoric Acid, Monomethyl Monophenyl Ester is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay by titration or chromatography and identification by spectroscopic methods (IR, NMR), to ensure high purity and consistent performance. Certificates of Analysis (COA) detailing all specifications are provided with every shipment to guarantee traceability and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC/Titration)	≥ 95.0%
Water Content (KF)	≤ 1.0%
Acidity (as H3PO4)	≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.