Description

Dibutyl Hydrogen Phosphite is an organophosphorus compound widely utilized as a versatile intermediate and additive. Its primary commercial value lies in its role as a stabilizer and antioxidant, preventing degradation in various polymer and chemical systems. This product is essential for manufacturers in the plastics, lubricant, and specialty chemical industries seeking to enhance product longevity and performance under oxidative stress.

Application

• Polymer Stabilizer: Acts as an effective antioxidant and secondary stabilizer in polyolefins (e.g., PP, PE) and PVC 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 lubricants and industrial greases.
• Chemical Intermediate: Serves as a key precursor in the synthesis of other organophosphorus compounds, including phosphonates and phosphate esters used as flame retardants or plasticizers.
• Metal Complexing Agent: Used in certain metal extraction and purification processes due to its chelating properties.
• Epoxy Resin Modifier: Employed to modify the properties of epoxy resin systems, improving flexibility and adhesion.
• Fuel & Oil Additive: Contributes to the stabilization of fuels and industrial oils against oxidation, helping to prevent sludge formation.

Basic Information

Product Name	Dibutyl Hydrogen Phosphite
CAS No.	109-47-7
Molecular Formula	C8H19O3P
Molecular Weight	194.21 g/mol
Synonyms	Dibutyl Phosphite; Butyl Phosphite; Hydrogen Dibutyl Phosphite; Di-n-butyl Hydrogen Phosphite; Dibutoxyphosphinous Acid; Phosphonic Acid, Dibutyl Ester; DBHP; NSC 404083
EINECS	203-676-5

Quality Control

Our Dibutyl Hydrogen Phosphite is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing, including assay, identity confirmation, and impurity profiling, to ensure it meets precise specifications and is suitable for its intended industrial applications. A Certificate of Analysis (COA) documenting purity and key physical-chemical parameters is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C) under an inert atmosphere (e.g., nitrogen) to minimize oxidation. Keep away from heat, sparks, open flames, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Refractive Index (n20D)	1.423 - 1.433
Density (20°C)	0.990 - 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.