Description

Phosphorous Acid, Cyclic Ethylene Ester, Phenyl Ester is a specialized organophosphorus compound with the CAS registry number 1077-05-0. This chemical serves as a versatile intermediate and additive, valued for its unique cyclic ester structure and phenyl functionality. It is primarily utilized in the synthesis of advanced materials, polymer stabilizers, and specialty agrochemicals where precise molecular architecture is required.

Application

• Polymer Additive & Stabilizer: Acts as a processing stabilizer and antioxidant in high-performance polymers, including polyolefins and engineering plastics, to prevent thermal and oxidative degradation.
• Chemical Intermediate: A key building block in the synthesis of more complex organophosphorus compounds, such as phosphonates and phosphite ligands for catalysts.
• Agrochemical Synthesis: Used in the manufacturing of specialized plant growth regulators, fungicides, and herbicides that require a phenylphosphonite moiety.
• Flame Retardant Synergist: Employed as a component in flame-retardant formulations for textiles and plastics, often in combination with halogenated or nitrogen-based compounds.
• Lubricant & Fuel Additive: Functions as an anti-wear and extreme pressure additive in advanced lubricant formulations and as a stabilizer in synthetic fuels.
• Epoxy Resin Modifier: Imparts improved thermal stability and adhesion properties when used as a modifier in epoxy resin systems for coatings and composites.

Basic Information

Product Name	Phosphorous Acid, Cyclic Ethylene Ester, Phenyl Ester
CAS No.	1077-05-0
Molecular Formula	C8H9O3P
Molecular Weight	184.13 g/mol
Synonyms	2-Phenyl-1,3,2-dioxaphospholane 2-oxide; Phenylphosphonic acid ethylene ester; Cyclic phenylphosphonite; 2-Phenyl-2-oxo-1,3,2-dioxaphospholane; Ethylene phenylphosphonite; Phenyl ethylene phosphite; 1,3,2-Dioxaphospholane, 2-phenyl-, 2-oxide; NSC 163083
EINECS	214-081-2

Quality Control

Our production of Phosphorous Acid, Cyclic Ethylene Ester, Phenyl Ester adheres to stringent quality management protocols. Each batch undergoes rigorous analytical testing, including chromatography and spectroscopy, to ensure high purity and consistency. Certificates of Analysis (COA) detailing identity, assay, and impurity profiles are provided with every shipment to guarantee 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 a controlled room temperature (15-25°C). This material is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen or argon) to maintain stability. Keep away from heat, sparks, open flames, and incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.520 - 1.530
Density (20°C)	1.25 - 1.35 g/cm³

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