Description

Phosphorous Acid Tri-o-Cresyl Ester is a specialized organophosphorus compound widely utilized as a high-performance additive and intermediate. Its primary commercial value lies in its role as a flame retardant and plasticizer, offering enhanced material properties and fire safety. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to improve product performance and meet stringent regulatory standards.

Application

• Primary use as a flame retardant and plasticizer in PVC, polyurethane foams, and other polymer systems.
• Key intermediate in the synthesis of other organophosphorus compounds for agrochemicals and pharmaceuticals.
• Additive in hydraulic fluids and lubricants to enhance thermal stability and anti-wear properties.
• Component in adhesive and sealant formulations to improve flexibility and flame resistance.
• Used in the production of specialty esters for various industrial applications.
• Potential application as a stabilizer in certain plastic and rubber products.

Basic Information

Product Name	Phosphorous Acid Tri-o-Cresyl Ester
CAS No.	2622-08-4
Molecular Formula	C21H21O3P
Molecular Weight	352.36 g/mol
Synonyms	Tris(2-methylphenyl) phosphite; Tri-o-cresyl phosphite; Phosphorous Acid Tris(2-methylphenyl) Ester; TOCP; o-Tricresyl Phosphite; Tris(o-tolyl) Phosphite; ToCP; 2-Methylphenyl Phosphite (Triester)
EINECS	220-067-8

Quality Control

Our Phosphorous Acid Tri-o-Cresyl Ester is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. The product undergoes rigorous analytical testing, including chromatography and spectroscopic methods, to verify its identity and meet defined specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This material is easily oxidized (store under inert atmosphere) and is compatible with strong alkali/organic solvent. Keep away from heat, sparks, and open flame. For long-term storage, consider maintaining under an inert gas blanket such as nitrogen to preserve product integrity.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC/HPLC)	≥ 98.0%
Specific Gravity (20°C)	1.10 - 1.15
Refractive Index (20°C)	1.550 - 1.560
Acidity (as H3PO3)	≤ 0.1%
Water Content (KF)	≤ 0.1%

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