Description

Diisodecyl Hydrogen Phosphite is an organophosphorus compound widely utilized as a high-performance intermediate and stabilizer. Its primary value lies in its ability to function as an effective antioxidant and chelating agent, protecting materials from oxidative degradation. This makes it a critical component 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 PVC to prevent thermal and oxidative degradation during processing and end-use.
• Lubricant & Grease Additive: Serves as an anti-wear and extreme pressure (EP) agent, as well as an antioxidant, in synthetic and industrial lubricants and greases.
• Chemical Intermediate: Used in the synthesis of other organophosphorus compounds, including phosphonates and more complex phosphite esters.
• Flame Retardant Synergist: Employed in halogen-containing flame retardant systems to improve efficacy and thermal stability.
• Adhesive & Sealant Formulation: Enhances the thermal stability and longevity of adhesives, sealants, and caulks.
• Metal Complexing Agent: Functions as a chelating agent to sequester metal ions that can catalyze unwanted degradation reactions in various formulations.

Basic Information

Product Name	Diisodecyl Hydrogen Phosphite
CAS No.	40621-54-3
Molecular Formula	C20H43O3P
Molecular Weight	362.53 g/mol
Synonyms	Diisodecyl phosphite; Hydrogen diisodecyl phosphite; Phosphorous acid, diisodecyl ester; Diisodecyl phosphonate (common misnomer); DIDP; DDP; Bis(isodecyl) hydrogen phosphite; Isodecyl alcohol, hydrogen phosphite
EINECS	254-990-5

Quality Control

Our Diisodecyl Hydrogen 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. Certificates of Analysis (COA) documenting key parameters are provided to guarantee consistency and reliability for your industrial processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area under an inert atmosphere (e.g., nitrogen) to minimize oxidation. Recommended storage temperature is 15-25°C. Keep away from strong oxidizers, acids, and bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (Titration)	≥ 95.0%
Acidity (as H3PO4)	≤ 0.5%
Color (APHA)	≤ 50
Moisture (KF)	≤ 0.1%
Specific Gravity (20°C)	0.920 - 0.940
Refractive Index (20°C)	1.450 - 1.460

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