Description

Triisobutyl Phosphite is a versatile organophosphorus compound widely used as a key intermediate and performance additive in industrial chemistry. Its primary value lies in its role as a stabilizer and antioxidant, protecting materials from degradation caused by heat, light, and oxidation. This chemical 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., PP, PE) and other polymers to prevent thermal and oxidative degradation during processing and service life.
• Lubricant & Fuel Additive: Functions as an anti-wear agent and antioxidant in synthetic lubricants, greases, and industrial oils to reduce friction and extend fluid life.
• Chemical Intermediate: Serves as a crucial building block in the synthesis of more complex organophosphorus compounds, including pesticides, flame retardants, and plasticizers.
• Epoxy Resin Modifier: Used to modify the properties of epoxy resin systems, improving flexibility and adhesion characteristics.
• Rubber Antioxidant: Imparts antioxidant properties to synthetic rubber compounds, helping to prevent cracking and loss of elasticity.
• Metal Complexing Agent: Utilized in metal extraction and purification processes due to its ability to form complexes with certain metal ions.

Basic Information

Product Name	Triisobutyl Phosphite
CAS No.	1606-96-8
Molecular Formula	C12H27O3P
Molecular Weight	250.31 g/mol
Synonyms	Phosphorous Acid Triisobutyl Ester; Tris(2-methylpropyl) Phosphite; Isobutyl Phosphite (tri-); Tris(isobutyl) Phosphite; P,Tris(2-methylpropyl) ester Phosphorous acid; Tributyl Phosphite (isomeric mixture); TIBP; NSC 9358
EINECS	216-524-6

Quality Control

Our Triisobutyl Phosphite is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including Gas Chromatography (GC) for assay and impurity profiling, to meet precise customer specifications. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and physical properties is provided with every 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 away from heat sources and incompatible materials. Due to its sensitivity to oxidation, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep container tightly sealed when not in use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.432 - 1.438
Density (20°C)	0.92 - 0.96 g/mL
Acidity (as H3PO4)	≤ 0.1 %

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