Description

Phosphorous Acid (4-Isopropylbenzyl)Diphenyl Ester is a specialized organophosphorus compound that serves as a high-performance intermediate and functional additive. Its molecular structure makes it valuable for applications requiring thermal stability and specific reactivity. This product is primarily utilized by manufacturers in the polymer and specialty chemical industries seeking to enhance material properties or synthesize advanced molecules.

Application

• As a stabilizer and antioxidant in high-temperature polymer formulations, including engineering plastics and synthetic fibers.
• An intermediate in the synthesis of advanced flame retardants and plasticizers for specialty materials.
• A key ligand or precursor in organometallic chemistry and catalyst systems.
• Used in research and development for creating novel functional additives with tailored properties.
• Potential application as a stabilizing agent in lubricants and hydraulic fluids under demanding conditions.

Basic Information

Product Name	Phosphorous Acid (4-Isopropylbenzyl)Diphenyl Ester
CAS No.	58019-06-0
Molecular Formula	C22H23O3P
Molecular Weight	366.39 g/mol
Synonyms	Diphenyl (4-Isopropylbenzyl) Phosphite; (4-Isopropylbenzyl)diphenyl phosphite; Phosphorous Acid, Diphenyl Ester, 4-Isopropylbenzyl Ester; Phosphorous Acid Diphenyl (4-Isopropylbenzyl) Ester; 4-Isopropylbenzyl Diphenyl Phosphite; Diphenyl(4-isopropylbenzyl) Phosphite; Stabilizer TPPI (related trade name); Organophosphite Antioxidant
EINECS	Contact for details

Quality Control

Our production of Phosphorous Acid (4-Isopropylbenzyl)Diphenyl Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. Each lot is analyzed against comprehensive specifications to confirm identity, purity, and performance characteristics. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 15-25°C. Keep container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Refractive Index (n20D)	1.555 - 1.565
Density (20°C)	1.10 - 1.15 g/cm³
Acidity (as H3PO3)	≤ 0.5%

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