Description

Trihexyl Phosphite is an organophosphorus compound widely utilized as a high-performance stabilizer and intermediate in advanced chemical synthesis. Its primary commercial value lies in its ability to act as an effective antioxidant and chelating agent, protecting materials from degradation. This product is essential for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product longevity and performance under demanding conditions.

Application

• Polymer Stabilizer: Acts as a secondary antioxidant and metal deactivator in polyolefins (e.g., polyethylene, polypropylene) to prevent thermal and oxidative degradation during processing and service life.
• Lubricant & Grease Additive: Functions as an anti-wear and extreme pressure (EP) additive, as well as an antioxidant, in synthetic and mineral-based lubricants and hydraulic fluids.
• Chemical Intermediate: Serves as a key reagent in the synthesis of other organophosphorus compounds, including phosphonates and more complex phosphite esters used in various applications.
• Plasticizer & Stabilizer Component: Used in PVC and other polymer formulations to improve flexibility and provide synergistic stabilization when combined with primary antioxidants.
• Adhesive & Sealant Formulations: Incorporated to improve the thermal stability and longevity of adhesives, sealants, and caulking materials.
• Fuel & Oil Additive: Employed as a stabilizer to control oxidation and deposit formation in fuels and industrial oils.

Basic Information

Product Name	Trihexyl Phosphite
CAS No.	6095-42-7
Molecular Formula	C18H39O3P
Molecular Weight	334.47 g/mol
Synonyms	Phosphorous Acid Trihexyl Ester; Tri-n-hexyl Phosphite; Hexyl Phosphite (Tri-); Tris(hexyloxy)phosphine; P(OCH2(CH2)4CH3)3; THP; Phosphorous Acid Tris(hexyl Ester); Tris(1-hexyl) Phosphite
EINECS	228-050-6

Quality Control

Our Trihexyl Phosphite is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee consistency and 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 hygroscopic (moisture-sensitive) and easily oxidized; it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation and to minimize contact with air and moisture. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Acidity (as H3PO4)	≤ 0.1 %
Water Content (KF)	≤ 0.1 %
Refractive Index (n20D)	1.4430 - 1.4470
Density (20°C)	0.890 - 0.910 g/mL

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