Description

Tripropyl Phosphite is a versatile organophosphorus compound widely utilized as a key intermediate and stabilizer in industrial chemistry. Its primary commercial value lies in its role as a ligand in metal complex catalysts and as an antioxidant and stabilizer in polymer systems. This product is essential for manufacturers in the polymer, agrochemical, and specialty chemical industries seeking to enhance product stability and catalytic efficiency.

Application

• Polymer Additive: Acts as a secondary antioxidant and heat stabilizer in plastics like PVC and polyolefins to prevent degradation during processing.
• Catalyst Ligand: Serves as a ligand in transition metal catalysts for hydroformylation and other organometallic reactions.
• Chemical Intermediate: Used in the synthesis of other organophosphorus compounds, including pesticides and flame retardants.
• Lubricant Additive: Functions as an anti-wear and extreme pressure additive in synthetic lubricants and hydraulic fluids.
• Epoxy Resin Stabilizer: Improves the thermal and color stability of epoxy resin systems.
• Metal Extraction Agent: Employed in solvent extraction processes for the separation and purification of specific metals.

Basic Information

Product Name	Tripropyl Phosphite
CAS No.	923-99-9
Molecular Formula	C9H21O3P
Molecular Weight	208.24 g/mol
Synonyms	Phosphorous Acid, Tripropyl Ester; Tri-n-Propyl Phosphite; Propyl Phosphite (3:1); Phosphorous Acid Tripropyl Ester; TPP; Tripropoxyphosphine; n-Tripropyl Phosphite; Phosphonic Acid, P,P,P-Tripropyl Ester
EINECS	213-099-8

Quality Control

Our Tripropyl Phosphite is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including gas chromatography (GC) for purity and identity confirmation, to ensure it meets precise specifications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance with your requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic and easily oxidized nature, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation and to minimize moisture uptake.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Refractive Index (n20D)	1.430 - 1.435
Density (20°C)	0.945 - 0.955 g/mL
Water Content (KF)	≤ 0.1%
Acidity (as H3PO4)	≤ 0.1%

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