Description

Phenyl-Phosphonothioic Acid Diphenyl Ester is an organophosphorus compound with a thiophosphoryl (P=S) core, serving as a versatile intermediate and functional additive. Its molecular structure makes it valuable for applications requiring flame retardancy, plasticization, and chemical synthesis. This product is essential for manufacturers and R&D teams in the polymer, specialty chemical, and material science industries seeking performance-enhancing additives.

Application

• As a flame retardant synergist or plasticizer in polymer formulations, including PVC, polyurethanes, and epoxy resins.
• As a key chemical intermediate in the synthesis of more complex organophosphorus compounds, such as pesticides or ligands.
• As a potential additive for lubricants to provide extreme pressure and anti-wear properties.
• In material science research for developing novel flame-retardant or self-extinguishing materials.
• As a stabilizer or modifier in specialty adhesive and coating systems.

Basic Information

Product Name	Phenyl-Phosphonothioic Acid Diphenyl Ester
CAS No.	88239-51-4
Molecular Formula	C18H15O2PS
Molecular Weight	326.35 g/mol
Synonyms	Diphenyl Phenylphosphonothioate; Phenylphosphonothioic Acid O,O-Diphenyl Ester; Diphenyl Phenylphosphonothioite; P,P-Diphenyl Phenylphosphonothioate; Thiophosphoric Acid Phenyl Diphenyl Ester; NSC 169101; Phenyl Phosphonothioic Acid Diphenyl Ester
EINECS	Contact for details

Quality Control

Our Phenyl-Phosphonothioic Acid Diphenyl Ester is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing, including chromatographic purity assays and identity confirmation, to ensure it meets precise specifications and consistent performance. Certificates of Analysis (COA) documenting all critical quality parameters are available upon request to support your quality assurance protocols.

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). Keep away from strong bases and incompatible materials such as strong oxidizing agents. The container should be kept tightly sealed when not in use to minimize moisture uptake and maintain product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid or low-melting solid
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 95.0%
Water Content (KF)	≤ 0.5%

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