Description

Dibutyl Phosphite is a versatile organophosphorus compound widely used as an intermediate and additive in industrial synthesis. Its primary value lies in its role as a stabilizer and antioxidant, protecting materials from degradation caused by oxidation and heat. This makes it a critical component for manufacturers in the polymer, lubricant, and specialty chemical industries seeking to enhance product longevity and performance.

Application

• Polymer Stabilizer: Acts as an effective antioxidant and heat stabilizer in the production of polyvinyl chloride (PVC) and other polymers, preventing discoloration and maintaining mechanical properties.
• Lubricant & Grease Additive: Serves as an anti-wear and extreme pressure (EP) additive, improving the performance and lifespan of industrial lubricants and metalworking fluids.
• Chemical Intermediate: Used in the synthesis of other organophosphorus compounds, including phosphonates and phosphate esters, which are key in flame retardants and plasticizers.
• Epoxy Resin Modifier: Functions as a reactive diluent and modifier in epoxy resin systems, influencing curing characteristics and final material properties.
• Fuel & Oil Additive: Employed as an antioxidant and detergent additive in fuels and lubricating oils to prevent sludge formation and oxidation.
• Metal Extraction & Chelation: Utilized in solvent extraction processes for the separation and recovery of specific metal ions from aqueous solutions.

Basic Information

Product Name	Dibutyl Phosphite
CAS No.	1809-19-4
Molecular Formula	C8H19O3P
Molecular Weight	194.21 g/mol
Synonyms	Di-n-butyl phosphite; Butyl phosphite (di-); Phosphorous acid, dibutyl ester; DBHP; Dibutoxyphosphine oxide; DBP; NSC 66411; Dibutyl hydrogen phosphonite
EINECS	217-315-6

Quality Control

Our Dibutyl Phosphite is manufactured under a stringent 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 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	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.423 - 1.433
Density (20°C)	0.980 - 1.010 g/mL
Acidity (as H3PO4)	≤ 0.5 %
Water Content (KF)	≤ 0.2 %

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